BLocking in mp not working for admin

When you're an admin in the server.properties file, your permissions are automatically overridden - so even if you assign yourself to a permission group, this has no effect by default.

The "admin.json" permission group is basically just a permission group that's called "admin", it's not related to admins in the server.properties file.

To change this behaviour, you can open the server.properties file and set Permission_AdminsFullPermissions to False. Make sure to assign yourself to a proper permission group before doing that (e.g. the "admin" group) - then these permission will take effect