I've got a standalone WFM for SharePoint 2013. Up to CU 4.
Working just fine previously, but just yesterday out of the blue, they all stopped working. They would only briefly work after a WFM server reboot and then they just stop again. No errors in SP logs, no events in the Event log, nothing to see in the WF or SB event logs. All the services are up and running. No changes to the WFM recently. At a complete loss. Anyone have any troubleshooting tips or ideas?
I suppose next I was thinking about removing from the SB & WF Farm and rejoining, but wanted to avoid that at the moment.