Somehow it was uninstalled. Weird.
There was also a bug in the code. Maybe a node.js version issue.
Change system group names
I build forum in Polish language and i have "Administrators" and "Global Moderators" but i need without "s" (Administrator and Global Moderator).
How change it?
Unfortunately you can't rename system groups, you can however change the name of the badge that displays next to usernames.