@Erik AdminFE is unmaintained, and using it can break your config. it’s provided as a convenience with Rebased, but the recommended way is to edit the config files manually. This is true for vanilla Pleroma as well - AdminFE was previously funded by a sponsor who pulled out, so there is no development on it.
As for the scopes issue… maybe try logging out and back in. You should have permission to do it, but it seems like the scopes on your token are wrong.