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On Inventory Click Event (Only with skript-gui GUI's)

Additionally, if you open a "non-player inventory" such as a GUI, the remaining 27 inventory slots now trigger the event while the "above GUI" does not trigger if you ...
GitHub

Items didn't run code when clicked.

Code won't run when click on the item. at java.util.concurrent.ConcurrentHashMap.putVal(Unknown Source) ~[?:1.8.0_301] at java.util.concurrent.ConcurrentHashMap.put ...