Minecraft Version:
1.10.2
Inventory Tweaks Version:
InventoryTweaks-1.61-58

Currently getting this issue when trying to sort a Colossal Chests inventory. Any time I click, even if it's not on an item this error appears. Turning shortcuts off stops the error, as you might guess.

With shortcuts on this error is also preventing shortcuts from being used to store and remove from colossal chests.

If I turn Middle Click on in Inventory Tweaks settings the game crashes when I attempt a middle click sort of a colossal chest throwing this same error. Crash log (See Line 595) Turning off Middle Click Sort stops the crash and middle click sort still works even though it complains in chat.