Ye it would probably bei fair, but its still Not allowed, wait for staff to reply, maybe you are allowed to use it after that. But If you want to...
You probably could, but LabyMod is still not allowed I think. You can also use badlion client or 5zig Mod ^^
You probably know it, but it should work now, if you still cant Join let ne know it
Yeah many People got this Problem, just reconnect or Restart your minecraft, it can take some time