Menu not working

Core informations

• About (PlayerServers / PSHubCore / PSServerCore) : PSServerCore
• Version : 3.7
• BungeeCord (or what fork) : Bungeecord
• Spigot : 1.8.8

About

Issue After I tried to add a plugin with /menu on the playerserver I stopped and started the playerserver and now the /menu doesn't work. It stopped working right after I added Essentials. https://imgur.com/KmPWL1D