Sharepoint Workflow Manager Backend Service crashing

Workflow manager backend service is crashing on our App server and restarting automatically on Production environment. Due to this all workflows have stopped working. Our workflow farm only has 1 server i.e. App server. Below are event viewer logs from App server. Any help will be appreciated!

Log Name: Microsoft-Workflow/Operational Source: Microsoft-Workflow Date: 12/23/2016 5:45:38 PM Event ID: 359 Task Category: (65175) Level: Critical Keywords: Dispatcher User: domain\username Computer: myappserver Description: Dispatcher failfast is causing the Workflow Manager backend to terminate. Exception: System.AggregateException: The dispatcher failure rate has reached 11%. InnerException is the last failure; see traces for other failures. ---> System.Runtime.Serialization.SerializationException: There was an error deserializing the object . '��e7-3b�g7@ Action' contains invalid UTF8 bytes. ---> System.Xml.XmlException: '��e7-3b�g7@ Action' contains invalid UTF8 bytes. ---> System.Text.DecoderFallbackException: Unable to translate bytes [8C] at index 0 from specified code page to Unicode. at System.Text.DecoderExceptionFallbackBuffer.Throw(Byte[] bytesUnknown, Int32 index) at System.Text.DecoderExceptionFallbackBuffer.Fallback(Byte[] bytesUnknown, Int32 index) at System.Text.DecoderFallbackBuffer.InternalFallback(Byte[] bytes, Byte* pBytes, Char*& chars) at System.Text.UTF8Encoding.FallbackInvalidByteSequence(Byte*& pSrc, Int32 ch, DecoderFallbackBuffer fallback, Char*& pTarget) at System.Text.UTF8Encoding.GetChars(Byte* bytes, Int32 byteCount, Char* chars, Int32 charCount, DecoderNLS baseDecoder) at System.Text.UTF8Encoding.GetChars(Byte[] bytes, Int32 byteIndex, Int32 byteCount, Char[] chars, Int32 charIndex) at System.Xml.XmlConverter.ToChars(Byte[] buffer, Int32 offset, Int32 count, Char[] chars, Int32 charOffset) --- End of inner exception stack trace --- at System.Xml.XmlConverter.ToChars(Byte[] buffer, Int32 offset, Int32 count, Char[] chars, Int32 charOffset) at System.Xml.XmlBufferReader.GetChars(Int32 offset, Int32 length, Char[] chars) at System.Xml.XmlBufferReader.ReadUTF8String(Int32 length) at System.Xml.XmlBinaryReader.ReadElementContentAsString() at System.Runtime.Serialization.XmlReaderDelegator.ReadElementContentAsGuid() at ReadDeferredMessageContextFromXml(XmlReaderDelegator , XmlObjectSerializerReadContext , XmlDictionaryString[] , XmlDictionaryString[] ) at System.Runtime.Serialization.ClassDataContract.ReadXmlValue(XmlReaderDelegator xmlReader, XmlObjectSerializerReadContext context) at System.Runtime.Serialization.XmlObjectSerializerReadContextComplex.InternalDeserializeInSharedTypeMode(XmlReaderDelegator xmlReader, Int32 declaredTypeID, Type declaredType, String name, String ns) at ReadArrayOfDeferredMessageContextFromXml(XmlReaderDelegator , XmlObjectSerializerReadContext , XmlDictionaryString , XmlDictionaryString , CollectionDataContract ) at System.Runtime.Serialization.CollectionDataContract.ReadXmlValue(XmlReaderDelegator xmlReader, XmlObjectSerializerReadContext context) at System.Runtime.Serialization.XmlObjectSerializerReadContextComplex.InternalDeserializeInSharedTypeMode(XmlReaderDelegator xmlReader, Int32 declaredTypeID, Type declaredType, String name, String ns) at ReadArrayOfDeferredMessageContextFromXml(XmlReaderDelegator , XmlObjectSerializerReadContext , XmlDictionaryString[] , XmlDictionaryString[] ) at System.Runtime.Serialization.ClassDataContract.ReadXmlValue(XmlReaderDelegator xmlReader, XmlObjectSerializerReadContext context) at System.Runtime.Serialization.XmlObjectSerializerReadContextComplex.InternalDeserializeInSharedTypeMode(XmlReaderDelegator xmlReader, Int32 declaredTypeID, Type declaredType, String name, String ns) at ReadWorkflowSessionStateFromXml(XmlReaderDelegator , XmlObjectSerializerReadContext , XmlDictionaryString[] , XmlDictionaryString[] ) at System.Runtime.Serialization.ClassDataContract.ReadXmlValue(XmlReaderDelegator xmlReader, XmlObjectSerializerReadContext context) at System.Runtime.Serialization.XmlObjectSerializerReadContextComplex.InternalDeserializeInSharedTypeMode(XmlReaderDelegator xmlReader, Int32 declaredTypeID, Type declaredType, String name, String ns) at System.Runtime.Serialization.XmlObjectSerializerReadContextComplex.InternalDeserialize(XmlReaderDelegator xmlReader, Type declaredType, String name, String ns) at System.Runtime.Serialization.NetDataContractSerializer.InternalReadObject(XmlReaderDelegator xmlReader, Boolean verifyObjectName) at System.Runtime.Serialization.XmlObjectSerializer.ReadObjectHandleExceptions(XmlReaderDelegator reader, Boolean verifyObjectName, DataContractResolver dataContractResolver) --- End of inner exception stack trace --- at System.Runtime.Serialization.XmlObjectSerializer.ReadObjectHandleExceptions(XmlReaderDelegator reader, Boolean verifyObjectName, DataContractResolver dataContractResolver) at System.Runtime.Serialization.XmlObjectSerializer.ReadObject(XmlDictionaryReader reader) at Microsoft.Activities.Dispatcher.WorkflowSessionSerializer.DeserializeWorkflowSessionState(Stream stateStream) at Microsoft.Activities.Dispatcher.MessageSessionContext.get_SessionState() at Microsoft.Activities.Dispatcher.DispatchLoopInstanceAsyncResult.SessionAccepted(IAsyncResult result) at Microsoft.Activities.Dispatcher.DispatchLoopInstanceAsyncResult.Isolate(AsyncCompletion callback, IAsyncResult result) at Microsoft.Activities.Dispatcher.DispatchLoopInstanceAsyncResult.ExceptionHandlingFrame(IAsyncResult result) --- End of inner exception stack trace --- ---> (Inner Exception #0) System.Runtime.Serialization.SerializationException: There was an error deserializing the object . '��e7-3b�g7@ Action' contains invalid UTF8 bytes. ---> System.Xml.XmlException: '��e7-3b�g7@ Action' contains invalid UTF8 bytes. ---> System.Text.DecoderFallbackException: Unable to translate bytes [8C] at index 0 from specified code page to Unicode. at System.Text.DecoderExceptionFallbackBuffer.Throw(Byte[] bytesUnknown, Int32 index) at System.Text.DecoderExceptionFallbackBuffer.Fallback(Byte[] bytesUnknown, Int32 index) at System.Text.DecoderFallbackBuffer.InternalFallback(Byte[] bytes, Byte* pBytes, Char*& chars) at System.Text.UTF8Encoding.FallbackInvalidByteSequence(Byte*& pSrc, Int32 ch, DecoderFallbackBuffer fallback, Char*& pTarget) at System.Text.UTF8Encoding.GetChars(Byte* bytes, Int32 byteCount, Char* chars, Int32 charCount, DecoderNLS baseDecoder) at System.Text.UTF8Encoding.GetChars(Byte[] bytes, Int32 byteIndex, Int32 byteCount, Char[] chars, Int32 charIndex) at System.Xml.XmlConverter.ToChars(Byte[] buffer, Int32 offset, Int32 count, Char[] chars, Int32 charOffset) --- End of inner exception stack trace --- at System.Xml.XmlConverter.ToChars(Byte[] buffer, Int32 offset, Int32 count, Char[] chars, Int32 charOffset) at System.Xml.XmlBufferReader.GetChars(Int32 offset, Int32 length, Char[] chars) at System.Xml.XmlBufferReader.ReadUTF8String(Int32 length) at System.Xml.XmlBinaryReader.ReadElementContentAsString() at System.Runtime.Serialization.XmlReaderDelegator.ReadElementContentAsGuid() at ReadDeferredMessageContextFromXml(XmlReaderDelegator , XmlObjectSerializerReadContext , XmlDictionaryString[] , XmlDictionaryString[] ) at System.Runtime.Serialization.ClassDataContract.ReadXmlValue(XmlReaderDelegator xmlReader, XmlObjectSerializerReadContext context) at System.Runtime.Serialization.XmlObjectSerializerReadContextComplex.InternalDeserializeInSharedTypeMode(XmlReaderDelegator xmlReader, Int32 declaredTypeID, Type declaredType, String name, String ns) at ReadArrayOfDeferredMessageContextFromXml(XmlReaderDelegator , XmlObjectSerializerReadContext , XmlDictionaryString , XmlDictionaryString , CollectionDataContract ) at System.Runtime.Serialization.CollectionDataContract.ReadXmlValue(XmlReaderDelegator xmlReader, XmlObjectSerializerReadContext context) at System.Runtime.Serialization.XmlObjectSerializerReadContextComplex.InternalDeserializeInSharedTypeMode(XmlReaderDelegator xmlReader, Int32 declaredTypeID, Type declaredType, String name, String ns) at ReadArrayOfDeferredMessageContextFromXml(XmlReaderDelegator , XmlObjectSerializerReadContext , XmlDictionaryString[] , XmlDictionaryString[] ) at System.Runtime.Serialization.ClassDataContract.ReadXmlValue(XmlReaderDelegator xmlReader, XmlObjectSerializerReadContext context) at System.Runtime.Serialization.XmlObjectSerializerReadContextComplex.InternalDeserializeInSharedTypeMode(XmlReaderDelegator xmlReader, Int32 declaredTypeID, Type declaredType, String name, String ns) at ReadWorkflowSessionStateFromXml(XmlReaderDelegator , XmlObjectSerializerReadContext , XmlDictionaryString[] , XmlDictionaryString[] ) at System.Runtime.Serialization.ClassDataContract.ReadXmlValue(XmlReaderDelegator xmlReader, XmlObjectSerializerReadContext context) at System.Runtime.Serialization.XmlObjectSerializerReadContextComplex.InternalDeserializeInSharedTypeMode(XmlReaderDelegator xmlReader, Int32 declaredTypeID, Type declaredType, String name, String ns) at System.Runtime.Serialization.XmlObjectSerializerReadContextComplex.InternalDeserialize(XmlReaderDelegator xmlReader, Type declaredType, String name, String ns) at System.Runtime.Serialization.NetDataContractSerializer.InternalReadObject(XmlReaderDelegator xmlReader, Boolean verifyObjectName) at System.Runtime.Serialization.XmlObjectSerializer.ReadObjectHandleExceptions(XmlReaderDelegator reader, Boolean verifyObjectName, DataContractResolver dataContractResolver) --- End of inner exception stack trace --- at System.Runtime.Serialization.XmlObjectSerializer.ReadObjectHandleExceptions(XmlReaderDelegator reader, Boolean verifyObjectName, DataContractResolver dataContractResolver) at System.Runtime.Serialization.XmlObjectSerializer.ReadObject(XmlDictionaryReader reader) at Microsoft.Activities.Dispatcher.WorkflowSessionSerializer.DeserializeWorkflowSessionState(Stream stateStream) at Microsoft.Activities.Dispatcher.MessageSessionContext.get_SessionState() at Microsoft.Activities.Dispatcher.DispatchLoopInstanceAsyncResult.SessionAccepted(IAsyncResult result) at Microsoft.Activities.Dispatcher.DispatchLoopInstanceAsyncResult.Isolate(AsyncCompletion callback, IAsyncResult result) at Microsoft.Activities.Dispatcher.DispatchLoopInstanceAsyncResult.ExceptionHandlingFrame(IAsyncResult result)'/>359016517500x40000000000002001297494'/>Microsoft-Workflow/OperationalmyappserverSystem.AggregateException: The dispatcher failure rate has reached 11%. InnerException is the last failure; see traces for other failures. ---> System.Runtime.Serialization.SerializationException: There was an error deserializing the object . '��e7-3b�g7@ Action' contains invalid UTF8 bytes. ---> System.Xml.XmlException: '��e7-3b�g7@ Action' contains invalid UTF8 bytes. ---> System.Text.DecoderFallbackException: Unable to translate bytes [8C] at index 0 from specified code page to Unicode. at System.Text.DecoderExceptionFallbackBuffer.Throw(Byte[] bytesUnknown, Int32 index) at System.Text.DecoderExceptionFallbackBuffer.Fallback(Byte[] bytesUnknown, Int32 index) at System.Text.DecoderFallbackBuffer.InternalFallback(Byte[] bytes, Byte* pBytes, Char*& chars) at System.Text.UTF8Encoding.FallbackInvalidByteSequence(Byte*& pSrc, Int32 ch, DecoderFallbackBuffer fallback, Char*& pTarget) at System.Text.UTF8Encoding.GetChars(Byte* bytes, Int32 byteCount, Char* chars, Int32 charCount, DecoderNLS baseDecoder) at System.Text.UTF8Encoding.GetChars(Byte[] bytes, Int32 byteIndex, Int32 byteCount, Char[] chars, Int32 charIndex) at System.Xml.XmlConverter.ToChars(Byte[] buffer, Int32 offset, Int32 count, Char[] chars, Int32 charOffset) --- End of inner exception stack trace --- at System.Xml.XmlConverter.ToChars(Byte[] buffer, Int32 offset, Int32 count, Char[] chars, Int32 charOffset) at System.Xml.XmlBufferReader.GetChars(Int32 offset, Int32 length, Char[] chars) at System.Xml.XmlBufferReader.ReadUTF8String(Int32 length) at System.Xml.XmlBinaryReader.ReadElementContentAsString() at System.Runtime.Serialization.XmlReaderDelegator.ReadElementContentAsGuid() at ReadDeferredMessageContextFromXml(XmlReaderDelegator , XmlObjectSerializerReadContext , XmlDictionaryString[] , XmlDictionaryString[] ) at System.Runtime.Serialization.ClassDataContract.ReadXmlValue(XmlReaderDelegator xmlReader, XmlObjectSerializerReadContext context) at System.Runtime.Serialization.XmlObjectSerializerReadContextComplex.InternalDeserializeInSharedTypeMode(XmlReaderDelegator xmlReader, Int32 declaredTypeID, Type declaredType, String name, String ns) at ReadArrayOfDeferredMessageContextFromXml(XmlReaderDelegator , XmlObjectSerializerReadContext , XmlDictionaryString , XmlDictionaryString , CollectionDataContract ) at System.Runtime.Serialization.CollectionDataContract.ReadXmlValue(XmlReaderDelegator xmlReader, XmlObjectSerializerReadContext context) at System.Runtime.Serialization.XmlObjectSerializerReadContextComplex.InternalDeserializeInSharedTypeMode(XmlReaderDelegator xmlReader, Int32 declaredTypeID, Type declaredType, String name, String ns) at ReadArrayOfDeferredMessageContextFromXml(XmlReaderDelegator , XmlObjectSerializerReadContext , XmlDictionaryString[] , XmlDictionaryString[] ) at System.Runtime.Serialization.ClassDataContract.ReadXmlValue(XmlReaderDelegator xmlReader, XmlObjectSerializerReadContext context) at System.Runtime.Serialization.XmlObjectSerializerReadContextComplex.InternalDeserializeInSharedTypeMode(XmlReaderDelegator xmlReader, Int32 declaredTypeID, Type declaredType, String name, String ns) at ReadWorkflowSessionStateFromXml(XmlReaderDelegator , XmlObjectSerializerReadContext , XmlDictionaryString[] , XmlDictionaryString[] ) at System.Runtime.Serialization.ClassDataContract.ReadXmlValue(XmlReaderDelegator xmlReader, XmlObjectSerializerReadContext context) at System.Runtime.Serialization.XmlObjectSerializerReadContextComplex.InternalDeserializeInSharedTypeMode(XmlReaderDelegator xmlReader, Int32 declaredTypeID, Type declaredType, String name, String ns) at System.Runtime.Serialization.XmlObjectSerializerReadContextComplex.InternalDeserialize(XmlReaderDelegator xmlReader, Type declaredType, String name, String ns) at System.Runtime.Serialization.NetDataContractSerializer.InternalReadObject(XmlReaderDelegator xmlReader, Boolean verifyObjectName) at System.Runtime.Serialization.XmlObjectSerializer.ReadObjectHandleExceptions(XmlReaderDelegator reader, Boolean verifyObjectName, DataContractResolver dataContractResolver) --- End of inner exception stack trace --- at System.Runtime.Serialization.XmlObjectSerializer.ReadObjectHandleExceptions(XmlReaderDelegator reader, Boolean verifyObjectName, DataContractResolver dataContractResolver) at System.Runtime.Serialization.XmlObjectSerializer.ReadObject(XmlDictionaryReader reader) at Microsoft.Activities.Dispatcher.WorkflowSessionSerializer.DeserializeWorkflowSessionState(Stream stateStream) at Microsoft.Activities.Dispatcher.MessageSessionContext.get_SessionState() at Microsoft.Activities.Dispatcher.DispatchLoopInstanceAsyncResult.SessionAccepted(IAsyncResult result) at Microsoft.Activities.Dispatcher.DispatchLoopInstanceAsyncResult.Isolate(AsyncCompletion callback, IAsyncResult result) at Microsoft.Activities.Dispatcher.DispatchLoopInstanceAsyncResult.ExceptionHandlingFrame(IAsyncResult result) --- End of inner exception stack trace --- ---> (Inner Exception #0) System.Runtime.Serialization.SerializationException: There was an error deserializing the object . '��e7-3b�g7@ Action' contains invalid UTF8 bytes. ---> System.Xml.XmlException: '��e7-3b�g7@ Action' contains invalid UTF8 bytes. ---> System.Text.DecoderFallbackException: Unable to translate bytes [8C] at index 0 from specified code page to Unicode. at System.Text.DecoderExceptionFallbackBuffer.Throw(Byte[] bytesUnknown, Int32 index) at System.Text.DecoderExceptionFallbackBuffer.Fallback(Byte[] bytesUnknown, Int32 index) at System.Text.DecoderFallbackBuffer.InternalFallback(Byte[] bytes, Byte* pBytes, Char*& chars) at System.Text.UTF8Encoding.FallbackInvalidByteSequence(Byte*& pSrc, Int32 ch, DecoderFallbackBuffer fallback, Char*& pTarget) at System.Text.UTF8Encoding.GetChars(Byte* bytes, Int32 byteCount, Char* chars, Int32 charCount, DecoderNLS baseDecoder) at System.Text.UTF8Encoding.GetChars(Byte[] bytes, Int32 byteIndex, Int32 byteCount, Char[] chars, Int32 charIndex) at System.Xml.XmlConverter.ToChars(Byte[] buffer, Int32 offset, Int32 count, Char[] chars, Int32 charOffset) --- End of inner exception stack trace --- at System.Xml.XmlConverter.ToChars(Byte[] buffer, Int32 offset, Int32 count, Char[] chars, Int32 charOffset) at System.Xml.XmlBufferReader.GetChars(Int32 offset, Int32 length, Char[] chars) at System.Xml.XmlBufferReader.ReadUTF8String(Int32 length) at System.Xml.XmlBinaryReader.ReadElementContentAsString() at System.Runtime.Serialization.XmlReaderDelegator.ReadElementContentAsGuid() at ReadDeferredMessageContextFromXml(XmlReaderDelegator , XmlObjectSerializerReadContext , XmlDictionaryString[] , XmlDictionaryString[] ) at System.Runtime.Serialization.ClassDataContract.ReadXmlValue(XmlReaderDelegator xmlReader, XmlObjectSerializerReadContext context) at System.Runtime.Serialization.XmlObjectSerializerReadContextComplex.InternalDeserializeInSharedTypeMode(XmlReaderDelegator xmlReader, Int32 declaredTypeID, Type declaredType, String name, String ns) at ReadArrayOfDeferredMessageContextFromXml(XmlReaderDelegator , XmlObjectSerializerReadContext , XmlDictionaryString , XmlDictionaryString , CollectionDataContract ) at System.Runtime.Serialization.CollectionDataContract.ReadXmlValue(XmlReaderDelegator xmlReader, XmlObjectSerializerReadContext context) at System.Runtime.Serialization.XmlObjectSerializerReadContextComplex.InternalDeserializeInSharedTypeMode(XmlReaderDelegator xmlReader, Int32 declaredTypeID, Type declaredType, String name, String ns) at ReadArrayOfDeferredMessageContextFromXml(XmlReaderDelegator , XmlObjectSerializerReadContext , XmlDictionaryString[] , XmlDictionaryString[] ) at System.Runtime.Serialization.ClassDataContract.ReadXmlValue(XmlReaderDelegator xmlReader, XmlObjectSerializerReadContext context) at System.Runtime.Serialization.XmlObjectSerializerReadContextComplex.InternalDeserializeInSharedTypeMode(XmlReaderDelegator xmlReader, Int32 declaredTypeID, Type declaredType, String name, String ns) at ReadWorkflowSessionStateFromXml(XmlReaderDelegator , XmlObjectSerializerReadContext , XmlDictionaryString[] , XmlDictionaryString[] ) at System.Runtime.Serialization.ClassDataContract.ReadXmlValue(XmlReaderDelegator xmlReader, XmlObjectSerializerReadContext context) at System.Runtime.Serialization.XmlObjectSerializerReadContextComplex.InternalDeserializeInSharedTypeMode(XmlReaderDelegator xmlReader, Int32 declaredTypeID, Type declaredType, String name, String ns) at System.Runtime.Serialization.XmlObjectSerializerReadContextComplex.InternalDeserialize(XmlReaderDelegator xmlReader, Type declaredType, String name, String ns) at System.Runtime.Serialization.NetDataContractSerializer.InternalReadObject(XmlReaderDelegator xmlReader, Boolean verifyObjectName) at System.Runtime.Serialization.XmlObjectSerializer.ReadObjectHandleExceptions(XmlReaderDelegator reader, Boolean verifyObjectName, DataContractResolver dataContractResolver) --- End of inner exception stack trace --- at System.Runtime.Serialization.XmlObjectSerializer.ReadObjectHandleExceptions(XmlReaderDelegator reader, Boolean verifyObjectName, DataContractResolver dataContractResolver) at System.Runtime.Serialization.XmlObjectSerializer.ReadObject(XmlDictionaryReader reader) at Microsoft.Activities.Dispatcher.WorkflowSessionSerializer.DeserializeWorkflowSessionState(Stream stateStream) at Microsoft.Activities.Dispatcher.MessageSessionContext.get_SessionState() at Microsoft.Activities.Dispatcher.DispatchLoopInstanceAsyncResult.SessionAccepted(IAsyncResult result) at Microsoft.Activities.Dispatcher.DispatchLoopInstanceAsyncResult.Isolate(AsyncCompletion callback, IAsyncResult result) at Microsoft.Activities.Dispatcher.DispatchLoopInstanceAsyncResult.ExceptionHandlingFrame(IAsyncResult result)<---  Log Name: Microsoft-Workflow/Operational Source: Microsoft-Workflow Date: 12/23/2016 5:45:37 PM Event ID: 358 Task Category: (65176) Level: Error Keywords: Dispatcher User: domain\username Computer: myappserver Description: Dispatcher encountered an unexpected exception: System.Runtime.Serialization.SerializationException: There was an error deserializing the object . '�22c0b�@Ac�eContext?' contains invalid UTF8 bytes. ---> System.Xml.XmlException: '�22c0b�@Ac�eContext?' contains invalid UTF8 bytes. ---> System.Text.DecoderFallbackException: Unable to translate bytes [8C] at index 0 from specified code page to Unicode. at System.Text.DecoderExceptionFallbackBuffer.Throw(Byte[] bytesUnknown, Int32 index) at System.Text.DecoderExceptionFallbackBuffer.Fallback(Byte[] bytesUnknown, Int32 index) at System.Text.DecoderFallbackBuffer.InternalFallback(Byte[] bytes, Byte* pBytes, Char*& chars) at System.Text.UTF8Encoding.FallbackInvalidByteSequence(Byte*& pSrc, Int32 ch, DecoderFallbackBuffer fallback, Char*& pTarget) at System.Text.UTF8Encoding.GetChars(Byte* bytes, Int32 byteCount, Char* chars, Int32 charCount, DecoderNLS baseDecoder) at System.Text.UTF8Encoding.GetChars(Byte[] bytes, Int32 byteIndex, Int32 byteCount, Char[] chars, Int32 charIndex) at System.Xml.XmlConverter.ToChars(Byte[] buffer, Int32 offset, Int32 count, Char[] chars, Int32 charOffset) --- End of inner exception stack trace --- at System.Xml.XmlConverter.ToChars(Byte[] buffer, Int32 offset, Int32 count, Char[] chars, Int32 charOffset) at System.Xml.XmlBufferReader.GetChars(Int32 offset, Int32 length, Char[] chars) at System.Xml.XmlBufferReader.ReadUTF8String(Int32 length) at System.Xml.XmlBinaryReader.ReadElementContentAsString() at System.Runtime.Serialization.XmlReaderDelegator.ReadElementContentAsGuid() at ReadDeferredMessageContextFromXml(XmlReaderDelegator , XmlObjectSerializerReadContext , XmlDictionaryString[] , XmlDictionaryString[] ) at System.Runtime.Serialization.ClassDataContract.ReadXmlValue(XmlReaderDelegator xmlReader, XmlObjectSerializerReadContext context) at System.Runtime.Serialization.XmlObjectSerializerReadContextComplex.InternalDeserializeInSharedTypeMode(XmlReaderDelegator xmlReader, Int32 declaredTypeID, Type declaredType, String name, String ns) at ReadArrayOfDeferredMessageContextFromXml(XmlReaderDelegator , XmlObjectSerializerReadContext , XmlDictionaryString , XmlDictionaryString , CollectionDataContract ) at System.Runtime.Serialization.CollectionDataContract.ReadXmlValue(XmlReaderDelegator xmlReader, XmlObjectSerializerReadContext context) at System.Runtime.Serialization.XmlObjectSerializerReadContextComplex.InternalDeserializeInSharedTypeMode(XmlReaderDelegator xmlReader, Int32 declaredTypeID, Type declaredType, String name, String ns) at ReadArrayOfDeferredMessageContextFromXml(XmlReaderDelegator , XmlObjectSerializerReadContext , XmlDictionaryString[] , XmlDictionaryString[] ) at System.Runtime.Serialization.ClassDataContract.ReadXmlValue(XmlReaderDelegator xmlReader, XmlObjectSerializerReadContext context) at System.Runtime.Serialization.XmlObjectSerializerReadContextComplex.InternalDeserializeInSharedTypeMode(XmlReaderDelegator xmlReader, Int32 declaredTypeID, Type declaredType, String name, String ns) at ReadWorkflowSessionStateFromXml(XmlReaderDelegator , XmlObjectSerializerReadContext , XmlDictionaryString[] , XmlDictionaryString[] ) at System.Runtime.Serialization.ClassDataContract.ReadXmlValue(XmlReaderDelegator xmlReader, XmlObjectSerializerReadContext context) at System.Runtime.Serialization.XmlObjectSerializerReadContextComplex.InternalDeserializeInSharedTypeMode(XmlReaderDelegator xmlReader, Int32 declaredTypeID, Type declaredType, String name, String ns) at System.Runtime.Serialization.XmlObjectSerializerReadContextComplex.InternalDeserialize(XmlReaderDelegator xmlReader, Type declaredType, String name, String ns) at System.Runtime.Serialization.NetDataContractSerializer.InternalReadObject(XmlReaderDelegator xmlReader, Boolean verifyObjectName) at System.Runtime.Serialization.XmlObjectSerializer.ReadObjectHandleExceptions(XmlReaderDelegator reader, Boolean verifyObjectName, DataContractResolver dataContractResolver) --- End of inner exception stack trace --- at System.Runtime.Serialization.XmlObjectSerializer.ReadObjectHandleExceptions(XmlReaderDelegator reader, Boolean verifyObjectName, DataContractResolver dataContractResolver) at System.Runtime.Serialization.XmlObjectSerializer.ReadObject(XmlDictionaryReader reader) at Microsoft.Activities.Dispatcher.WorkflowSessionSerializer.DeserializeWorkflowSessionState(Stream stateStream) at Microsoft.Activities.Dispatcher.MessageSessionContext.get_SessionState() at Microsoft.Activities.Dispatcher.DispatchLoopInstanceAsyncResult.SessionAccepted(IAsyncResult result) at Microsoft.Activities.Dispatcher.DispatchLoopInstanceAsyncResult.Isolate(AsyncCompletion callback, IAsyncResult result) at Microsoft.Activities.Dispatcher.DispatchLoopInstanceAsyncResult.ExceptionHandlingFrame(IAsyncResult result) Event Xml: '/>358026517600x40000000000002001297488'/>Microsoft-Workflow/OperationalPASPRDAPP01.abgplanet.abg.comSystem.Runtime.Serialization.SerializationException: There was an error deserializing the object . '�22c0b�@Ac�eContext?' contains invalid UTF8 bytes. ---> System.Xml.XmlException: '�22c0b�@Ac�eContext?' contains invalid UTF8 bytes. ---> System.Text.DecoderFallbackException: Unable to translate bytes [8C] at index 0 from specified code page to Unicode.