Thanks to everyone!

Thanks

ZombieWorldJim and YaMang !!!!!!!!!! And of course FastBurst for the cool plugin!

No Line 114 & 292 or 303
Search in cs for
.Any(group => Permission.UserHasGroup
and fix with
.Any(group => Permission.UserHasGroup(player.userID.Get().ToString(CultureInfo.InvariantCulture), group)))

Thanks it works

ZombieWorldJim

I spent a while trying to get this to work. For anyone struggling, use the below
Change lines 114 & 303 to 
.Any(group => Permission.UserHasGroup(player.userID.Get().ToString(CultureInfo.InvariantCulture), group)))

Make sure to include the . at the beginning

Thanks @YaMang and @ZombieWorldJim!I was able to get it working from your posts.