SP2013 WF works for admin but not end-users

Question

A simple SP2013 WF calls a SP2010 WF to send email, simple.  Works for me (admin) but when a SP user edits an item on the list (which fires the WF), the WF gets to the 2010 call, and fails with this error...
RequestorId: f8c56627-e4e5-5a26-0000-000000000000. Details: An unhandled exception occurred during the execution of the workflow instance. Exception details: System.ApplicationException: HTTP 401 {"Transfer-Encoding":["chunked"],"X-SharePointHealthScore":["0"],"X-SP-SERVERSTATE":["ReadOnly=0"],"SPClientServiceRequestDuration":["61"],"SPRequestGuid":["f8c56627-e4e5-5a26-97ee-ad70ca4d3291"],"request-id":["f8c56627-e4e5-5a26-97ee-ad70ca4d3291"],"X-FRAME-OPTIONS":["SAMEORIGIN"],"MicrosoftSharePointTeamServices":["16.0.0.2930"],"X-Content-Type-Options":["nosniff"],"X-MS-InvokeApp":["1;
RequireReadOnly"],"Cache-Control":["max-age=0, private"],"Date":["Wed, 25 Jun 2014 02:44:54 GMT"],"P3P":["CP=\"ALL IND DSP COR ADM CONo CUR CUSo IVAo IVDo PSA PSD TAI TELo OUR SAMo CNT COM INT
NAV ONL PHY PRE PUR UNI\""],"Server":["Microsoft-IIS\/7.5"],"WWW-Authenticate":["NTLM"],"X-AspNet-Version":["4.0.30319"],"X-Powered-By":["ASP.NET"]} at System.Activities.Statements.Throw.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) Exception from activity Throw If Sequence Sequence TryCatch Sequence Microsoft.SharePoint.WorkflowServices.Activities.RetryForDurationPolicy HTTPPost_WorkflowInterop_EnableEvents WorkflowInterop DynamicActivity<Guid>
Then If Working Sequence Flowchart Sequence RCSEmailCst.WorkflowXaml_4f7b53dc_968d_4e22_a812_3178e7b01bad
Spent an hour on phone with M$ support, only to be told it's my fault and I have to re-design my WF...if my WF gets any simpler I'll have to use carrier pigeons to get messages to customers!
I've Googled the error message, results suggest that User Profile Syn is out of whack but M$ support swears up & down our sync is working fine.
Anyone?
Edit to add: we have a hosted implementation of SP2013, NOT on-prem

Answer 1

Hi  ,
According to your description, my understanding is that the SharePoint workflow 2013 does not work for end-users in your environment.
For your issue, it can be a permission for the user initiating the workflow. Please make sure  site feature Workflows can use app permissions is activated. Go to Site actions > Site Settings >
Site features > Workflows can use app permissions.  Make sure the user is one member of a SharePoint Group.
Also please  provide more detail information about the error message  to determine the exact cause of the error. You can have a look at the blog:
http://ranaictiu-technicalblog.blogspot.com/2013/03/sharepoint-2013-workflow-debugdiagnosis.html
Best Regards,
Eric
Eric Tao
TechNet Community Support