I'm using this on a large network, on each network server if I try a command like /ban Blabla Test instead of getting the player banned i get a message back: /ban player reason

No console errors, just does not work, i just updated few day ago to this new uuid compatible version.

I'm using v5.5.0

That means the plugin is disabled. Check your logs around start up for more information. It is most likely it failed to connect to the database.