Getting a RuntimeError when trying to force a Failover

Hey I was wondering if anyone has been able to solve this.

Whenever I force a failover I get this error when its running on the back up. Both the master and backup gateway are running 8.1.38 both master and backup have version 1.1.38 designer.

I've tried updating to .41 and I still got the same Error. I downgraded both to .38, still same error.

I've cleared the cache by deleting .ignition, I've tried a clean install on the master and back up but still no luck.