I recently changed my personal email address to a new domain in Office 365.  After doing so all workflows that run under a service account (that remained static and did not change) using the run workflow action fail with the the following error

Error: RequestorId: 17529639-7a0e-c0b4-0000-000000000000. Details: ServiceNoResponset

To date I have removed and reinstalled and retrusted the nintex workflow service and it still does not work.  Any thoughts on how to troubleshoot this?