I found an XGUI bug that I thought I might point out, considering it has forced me to restart my server twice:
(And it's not something I can take screens of or show an error message, unfortunately)
I finished setting up all my teams and groups the other day, through XGUI.
But once everything was finished, I decided to rename the "operator" group to "moderator".
And that was a bad idea;
For some reason, when you change the name of a group through XGUI, it prevents any more changes to the teams.
I cannot add, remove, change, apply teams through XGUI, it simply does not respond.
Not sure what to tell you as for errors, because there are no errors in the console, it just stops working, until you restart the server.
Even when I change the newly renamed "moderator" group back to "operator" it is frozen up, nothing can fix it besides a restart.