Hi after upgrade from v5 to v6 i have one issue:
1) cant save new agent because got a error: Please make sure you've chosen at least one transport method for mandatory notifications.
but if i mark all notification from admin or agent account preferencess mark dissapear.
I see im my log: error OTRS-CGI-37 Need GroupName!
when i try save preferences from existing user, his mail notification and prefered queue setting disappear too.
I have simillar issue but on chromium (windows) : https://bugs.otrs.org/show_bug.cgi?id=13461