Workflow internal status - Suspended - Error 401

Question

Hi All,
I have created a simple workflow in SharePoint 2013 Designer 
When I start the workflow manually, and when I click on it to see the status of workflow it shows - Internal Status - Suspended 
Details are as follows : 
RequestorId: 16f7a305-4450-46c2-0000-000000000000. 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 <serviceDebug> 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":["16f7a305-4450-46c2-a317-044d8178b412"],"request-id":["16f7a305-4450-46c2-a317-044d8178b412"],"X-FRAME-OPTIONS":["SAMEORIGIN"],"SPRequestDuration":["3130"],"SPIisLatency":["1"],"Server":["Microsoft-IIS\/8.5"],"WWW-Authenticate":["Bearer
realm=\"e57a12ef-af95-439f-ab00-b14d4c799098\",client_id=\"00000003-0000-0ff1-ce00-000000000000\",trusted_issuers=\"00000005-0000-0000-c000-000000000000@*,[email protected]4c799098\"","NTLM"],"X-Powered-By":["ASP.NET"],"MicrosoftSharePointTeamServices":["15.0.0.4569"],"X-Content-Type-Options":["nosniff"],"X-MS-InvokeApp":["1;
RequireReadOnly"],"Date":["Mon, 20 Apr 2015 06:57:51 GMT"]} at Microsoft.Activities.Hosting.Runtime.Subroutine.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)
This is not a system account, even then it is giving the same error.
My User Profile services are also working fine, Times & Admin service are also working fine 
Please help

Answer 1

Hi,
Please do as follows:
1.Navigate to the site that the workflow is on in SharePoint 2013 Designer.
2.Go to All Files -> Lists
3.Right click on Workflow History
4.Select Properties
5.Click on Permissions for this list under the ‘Customization’ section (This should open up the edit permissions page in the browser)
6.Break inheritance on this list by selecting Stop Inheriting Permissions in the new opened browser window
7.Use the check box next to the appropriate group (probably the visitors group) to select the group that needs updated permissions
8.Select Edit User Permissions
9.Grant the group 'Contribute' permissions
10.Select OK
More information is here:
https://sharepointcreations.wordpress.com/2014/02/18/sharepoint-2013-workflow-cancels-automatically/
If the issue still exists, please check the link below with the troubleShooting steps:
http://blog.bugrapostaci.com/2014/02/01/sharepoint-2013-workflows-are-not-working-issue/
Best Regards
TechNet Community Support
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