Hello,
If you read the errors you see they have nothing to do with items so don’t worry that’s not what did it. Perhaps you changed your gamemode to use a different HUD class or Unreal just decided to unhook some wires to keep you on your toes.
The real error is because in the InventoryPlayerController it looks like in your PlayerInitialize function the HUDReference isn’t being set. This reference is used by the system to know where to get references to different widgets in the UI. In this case it’s trying to access and read from the HUDReference to show and hide the InteractText widget when you have highlighted an item.
You can see where it sets the HUDReference in the InventoryPlayerController show in this screenshot.
And here you can see where one of the errors are, as it is trying to read the HUDReference to find the InteractText Widget but since HUDReference is null it’s giving the error.
By reading those errors you should be able to figure out why your project isn’t setting the HUDReference and resolve them quickly.
If you are still having issues after checking that out, please send us a support email to support@vanguardinteractive.com