Hey Sean,
I was just about to post an update to this. The version I’m using is the Binary (Launcher). However, something corrupted one of my UMG assets and that seems to be causing the error.
LogCookCommandlet:Warning: Package /Game/GUI/Items/Elements/ItemButtons/AcceptingSlot supposed to be fully loaded but isn't. RF_WasLoaded is set
This right here, is my problem. The widget compiles just fine, the game works as intended with it whenever I play in stand-alone, but anytime I try to save the AcceptingSlot asset, keeps saying it’s in use.