Some people do not have permission to use a mechanic. what are the permission nodes?

When I interact with the cauldren it tells me: are you sure you have the right ingredients.

There are only some Permissions for commands and some admin permissions, see here: https://github.com/DieReicheErethons/Brewery/wiki/Commands

There are no permissions for any Brewing yet, also there is nothing to stop anyone to put anything into the cauldron.