Players have been freely able to take items out of the menus and into their inventories. No commands execute when the items in the GUI are cliked - it literally just opens an inventory of free stuff. I have tried versions 12.0 and 11.6, both have the same issue. No errors. No incompatible plugins are installed. Running (Paper)Spigot 1.8.8. EDIT: Code (Text): [Server thread/ERROR]: [DeluxeMenus] Plugin DeluxeMenus v1.11.6 has failed to register events for class com.extendedclip.deluxemenus.PlayerListener because org/bukkit/event/entity/EntityPickupItemEvent does not exist. Found this on the startup logs.