We are having this issue in SP Workflow 2013 that even we create a simple workflow like sending email or just changing status name it always goes to Suspended stage.
Below is the error we always experience:
RequestorId: 1236f263-86b3-1728-0000-000000000000. Details: An unhandled exception occurred during the execution of the workflow instance. Exception details: System.ApplicationException: HTTP 401 {"error_description":"The server was unable to process the request due to an internal error. For more information about the error, either turn on IncludeExceptionDetailInFaults (either from ServiceBehaviorAttribute or from the configuration behavior) on the server in order to send the exception information back to the client, or turn on tracing as per the Microsoft .NET Framework SDK documentation and inspect the server trace logs."} {"x-ms-diagnostics":["3001000;reason=\"There has been an error authenticating the request.\";category=\"invalid_client\""],"SPRequestGuid":["1236f263-86b3-1728-b863-e8c83aefd80d"],"request-id":["1236f263-86b3-1728-b863-e8c83aefd80d"],"X-FRAME-OPTIONS":["SAMEORIGIN"],"SPRequestDuration":["42"],"SPIisLatency":["1"],"Server":["Microsoft-IIS/8.5"],"WWW-Authenticate":["Bearer realm=\"9445b918-6209-4438-900e-2e406a825b5f\",client_id=\"00000003-0000-0ff1-ce00-000000000000\",trusted_issuers=\"00000005-0000-0000-c000-000000000000@*,00000003-0000-0ff1-ce00-000000000000@9445b918-6209-4438-900e-2e406a825b5f\"","NTLM"],"X-Powered-By":["ASP.NET"],"MicrosoftSharePointTeamServices":["15.0.0.4641"],"X-MS-InvokeApp":["1; RequireReadOnly"],"Date":["Wed, 22 Jul 2015 02:30:12 GMT"]} at Microsoft.Activities.Hosting.Runtime.Subroutine`1.SubroutineChild.Execute(CodeActivityContext context) at System.Activities.CodeActivity.InternalExecute(ActivityInstance instance, ActivityExecutor executor, BookmarkManager bookmarkManager) at System.Activities.Runtime.ActivityExecutor.ExecuteActivityWorkItem.ExecuteBody(ActivityExecutor executor, BookmarkManager bookmarkManager, Location resultLocation)
We already configured SMTP Mail, User Profile Service in our server but we still cant still make SP Worflow 2013 work.
Other thing that I noticed, the modified by in 2013 is using domain/username but in 2010 its using UserName [DomainGroup].