WorkflowTaskTimeout and the workflow stops, how to make workflow resume running
Have you tried fixing the error and restarting the workers?
You should be able to see the error in the UI, by clicking on the
WorkflowTaskFailed event or looking at the event history.
If you want to share the event history we can help with it.
Just to add, workflow task has a default 10s timeout. Looking at the WorkflowTaskFailed event properties as Antonio mentioned could help.
I assume that your workflow execution is still running, so yeah you could try to find whats causing the workflow task (an unit of execution of your workflow code, see more info here) to fail and restart your worker(s) to allow it to continue exec on next workflow task retry.