Trouble with Widget

I painstakingly followed a youtube tutorial to create my own basic inventory and crafting system. After the first video the content boxes of what I created should have come up on the screen when I hit play - they did not. I’ve redone the widget creation twice without finding anywhere I made a mistake or anything I missed, it still does not show up when I hit play. If anyone can see where I missed something and let me know what must be done to get this widget functioning correctly, it would be greatly appreciated.

Sorry I neglected to add the screen shot earlier.