Sorry I meant to say the demo Inventory/Equipment Character class.
The issue is then something in your logic that just isn’t letting the Inventory Initialize. I would suggest working through that function and making sure everything is firing off. There is a green section where it initializes the client inventory UI and passes in the HUD Reference to the InventoryManagerComponent. I would start there and use breakpoints and print strings to figure out what is happening.
Also check your InventoryHUD Class as that is where the HUD Layout is loaded and the InventoryPlayerController gets the HUDReference from the InventoryHUD class at runtime.