Unable to Upgrade VOH (Steam)

I purchased the VOH DLC on steam yesterday. I think id rather have the ultimate after thinking about it. But it wont let me upgrade in steam. On the In-Game purchase screen its all grayed out. In the steam store it shows it as full price even though im on the deluxe.

Is there some other way to accomplish this?

I have exactly the same error, I purchased the basic edition and can’t upgrade to Deluxe, the screen is gray, contacting support had no effect, they respond with standard bot phrases, I just have to wait for a fix in Steam

Yeah, I havent figured it out. I just assume they dont want my money at this point. My buddy was having the same issue with Playstation a few days ago and they fixed it.