Some quick context: I'm running Bukkit/Spigot 1.8. Everytime I run my server with Essentials, this error occurs, and most but not all commands (I'm assuming the ones Essentials has connections with) run but do nothing and return nothing. Example: Type in /gmc, gamemode doesn't change. No return in the chat box, the terminal doesn't show an error. I used this version on a clean server, but still always get this error.