From this update you need an additional plugin Luckperms so that the roles are assigned to the player

Luckperms : https://www.spigotmc.org/resources/luckperms.28140/

Commands for Luckperms:

/luckperms user Elia1802 permission set ghost.owner true = Owner true
/luckperms user Elia1802 permission set ghost.owner false = Owner false
/luckperms user Elia1802 permission set ghost.admin true = Admin true
/luckperms user Elia1802 permission set ghost.admin false = Admin false
/luckperms user Elia1802 permission set ghost.developer true = Developer true
/luckperms user Elia1802 permission set ghost.developer false = Developer false
/luckperms user Elia1802 permission set ghost.moderator true = Moderator true
/luckperms user Elia1802 permission set ghost.moderator false = Moderator false

In the tablist Config you can change the role names