when am creating private note I got an error like
Unhandled Exception: System.ServiceModel.FaultException`1[[Microsoft.Xrm.Sdk.OrganizationServiceFault, Microsoft.Xrm.Sdk, Version=8.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35]]: Object address not found on party or party is marked as non-emailableDetail:
<OrganizationServiceFault xmlns:i="www.w3.org/.../XMLSchema-instance" xmlns="schemas.microsoft.com/.../Contracts">
<ErrorCode>-2147220891</ErrorCode>
<ErrorDetails xmlns:d2p1="schemas.datacontract.org/.../System.Collections.Generic">
<KeyValuePairOfstringanyType>
<d2p1:key>OperationStatus</d2p1:key>
<d2p1:value xmlns:d4p1="www.w3.org/.../XMLSchema" i:type="d4p1:string">0</d2p1:value>
</KeyValuePairOfstringanyType>
<KeyValuePairOfstringanyType>
<d2p1:key>SubErrorCode</d2p1:key>
<d2p1:value xmlns:d4p1="www.w3.org/.../XMLSchema" i:type="d4p1:string">-2146233088</d2p1:value>
</KeyValuePairOfstringanyType>
</ErrorDetails>
<Message>Object address not found on party or party is marked as non-emailable</Message>
<Timestamp>2017-12-13T14:43:06.1354666Z</Timestamp>
<InnerFault i:nil="true" />
<TraceText>
[Microsoft.Crm.ObjectModel: Microsoft.Crm.ObjectModel.SyncWorkflowExecutionPlugin]
[63a21e3c-12e0-e711-80df-005056a40414: ]
Starting sync workflow 'Private Notes send as Email', Id: 52a21e3c-12e0-e711-80df-005056a40414
Entering ConditionStep5_step: Check Notes for SR or Incident
Entering SendEmailStep7_step: Send email to Originator
Sync workflow 'Private Notes send as Email' terminated with error 'Object address not found on party or party is marked as non-emailable'
</TraceText>
</OrganizationServiceFault>
can you help me anyone