Same problem with both 22.04 Server and Ubuntu Mate 22.04.
All the confined GUI snaps have this problem and thus can't run.
First, I encountered running MATE desktop via X2Go Server.
Then I tried to see if using xRDP would work. No still problem persists whether I use xRDP or X2Go
Left unable to remotely run any UI confined snaps using Ubuntu Server/Mate 22.04 until fix or workaround instructions provided.
Same problem with both 22.04 Server and Ubuntu Mate 22.04.
All the confined GUI snaps have this problem and thus can't run.
First, I encountered running MATE desktop via X2Go Server.
Then I tried to see if using xRDP would work. No still problem persists whether I use xRDP or X2Go
Left unable to remotely run any UI confined snaps using Ubuntu Server/Mate 22.04 until fix or workaround instructions provided.