Hi i have PEX installad on my server and im using it with EssentialsX. I have created goups and added peole there. But when they try to do a command i gave them they can’t do it, there prefixes/suffixes work but not the permissions. Can someone help me? (As an example i gave mods essentials.fly.use and default essentials.back.use)

Unfortunately PermissionsEx is currently unmaintained and no further updates are planned. Because of this, all issues are being closed. If you are looking for an actively maintained permissions plugin, take a look at LuckPerms. It is compatible with major server platforms and can import data from PEX.