Hi, Fred.
I'm using release 4.0.5.
I made a fresh redeploy today and reproduced the issue.

I'm attaching engine and vdsm log file, the time to look is around 12:15:13

Also, when I try to delete storage domain from engine - it also returns error, so, this domain seems to be stuck in configuration (it is also displayed at the end of engine log)

Appreciate any comments.

Sergei