I believe this is a known issue (https://github.com/vatesfr/xen-orchestra/issues/5973) that is unlikely to be fixed in XO5.

We'll need to wait for @pdonias to be back from holidays to have more info on this.

just-333 created this issue in vatesfr/xen-orchestra open Error on vm.set from Jobs tab in XO web GUI #5973

Answered on the XO forum, thank you 🙂