I needed to change the account that are running my Workflow Manager services.
Logged into the server running the service and used the following PowerShell using the account that installed Workflow Manager and ran it successfully.
$password = ConvertTo-SecureString "NotMyActualPassword" -AsPlainText -Force Stop-SBFarm Update-SBHost -RunAsPassword $password Update-WFHost -RunAsPassword $password Start-SBFarm
Services restarted, ran an IISReset just to be sure.
However, now my workflow's are just at a "Not Started" status. Triggering a workflow to manually start just ques up another instance of the workflow. No specific errors show up in the event viewer.
Any pointers to what could be wrong? Anything that's need to be updated from SharePoint?