I haven't been able to get this feature to work. Can you check it out for me?

effect:
lightning: true
sound:
# set this empty in order to disable it
type: 'LEVEL_UP'
pitch: 0.1
volume: 1

When a player gain a combat level. no lightning and it seems to me the mcmmo default level up event might taken over this?

I'm late but thanks for closing this.

Enough permissions?

There is an effect permission ?

Yes plugin name in lowercase and '.effect'

Ok, that would explains it. ☺️

If it is fixed, could you close it?