Hello @bedmanager, thank you for your message and sorry for the delay.
Could you please provide a screenshot of your workflow?
And also please provide a screenshot of Workflow health page. To do that please navigate to your
Site settings -> Workflow settings (Site Administration) -> Workflow Health
There you should see all the workflows that you started and on the ones that failed there is should be an error. For example:
Or you could also click on the name of the workflow and see the detailed information about it.