If enabled the crafting inventory of players without the configured permission will not be visualized
If you're updating from a previous version and want to use the permission feature you need to add the permission section to the config yourself. I've pasted the new default config below for reference.
# Will move the frame's hitbox out of the way to allow players to # access the crafting table from the top. This will only work on # 1.16.5, unfortunately. adjust-hitbox: false
permission:
enable: false
perm: "my.cool.permission"