This is a strange one... the levels arent working for some players, but work for others. So it isnt everyone.
Crafting works for everyone.
Default group has the permission. Config "Enable Permission": true is set.
I change config to "Enable Permission": false - same issue....some people are fine...some are not.
I stopped plugin, removed the data files and restarted plugin so make a new data set.
Nobody's levels increased. Crafting still works.
I am using the latest version 3.1.4