JCInventory, Grid based jigsaw Inventory for your projects

I can see the icon moving and i hear the sound when i start to drag it and when i drop it somewhere.
The icon do not vanish when i drop it(in the inventory to a new slot, outside or anywhere else). It just simply goes back to its original place.
I have disabled all my UMG widgets.
If i right click on the icon, the menu will drop down with the options “Use,Drop,Cancel” but only the “cancel” option works. The other just play the sound and nothing happens.
If i hover the mouse over the icon i can see the description text pop up with the correct text.