Problem/Bug Could not pass event PlayerCommandPreprocessEvent to SuperLobby v4.0.3 org.bukkit.event.EventExcept

Hey guys, I've got a problem with the SuperLobbyDeluxe plugin... Newbies can't use the menu to switch to other worlds/servers... I hope you guys can help me with this!

Server log: https://pastebin.com/V7UEepUA
config.yml: https://pastebin.com/Hr4y14ND
customevents.yml: https://pastebin.com/tZxkVaDv
items.yml: https://pastebin.com/1k7puVM0
menus.yml: https://pastebin.com/eef7MEiT

Plugins: WorldEdit, WorldGuard, Essentials, PermissionsEx, DoubleJump, PerWorldChat, PerWorldTablist, PerWorldPlugins, MultiverseCore, MultiversePortals,

Server version: Spigot-1.8.8.jar

Tried with Bukkit/Paper: Yes
Tried to update plugin: Yes
Gave the right permissions: Yes

 

Theres nothing really special above it but here it is: https://pastebin.com/brTM4eNH

 

And this is the server startup: https://pastebin.com/7DyzQL7Z

And this is the server startup: https://pastebin.com/7DyzQL7Z

EDIT by Moderator: merged posts, please use the edit button instead of double posting.