[14:03:19] [Server thread/WARN]: [Autorank] Autorank has some warnings for you:
[14:03:19] [Server thread/WARN]: [Autorank] (Priority 10) 'You used the 'Player' group, but it was not recognized in your permission plugin!'

I don't understand, it's 'Player' in my PEX group, not 'player' or 'players'

I'm running Autorank-4.1 on a 1.11 server. Please get back to me quickly.

I downloaded an older version of Autorank and that seems to have fixed my problem.