A severe bug was patched
Updating as soon as possible is highly reccomended

However! Items with actions as servercommand and commandasop inside player inventories will stop working (all items saved inside /serveritem will be automatically updated)

Is there a way to avoid that?
You have 2 ways, you can enable unsafe mode on config.yml, do this only if you are 100% sure that only trusted users have creative mode

Or you can manually update old items inside player inventories with the command /itemtagupdateolditem while having the item in hand, do not give this command permission to untrusted users


new:
+ Added a placeholder for uses left of items actions, you can toggle visibility on the gui /it actions