[UMG] Drag and drop problem

Hello, i have a problem that i cannot resolve.
I am trying to create a simple drag and drop for a widget. I have a main widget and another one that is the inventory of the player, i want the player to be able to drag the inventory widget around, but the drop event is not recognized. I read that the problem is the visibility of the main widget, it should be set to visible but if i try i can’t even drag the inventory.
If you need more details just ask me, i hope someone can help.