This is only applicable to you if you are using the Beta Channel. Subscribing to a workshop item won't do anything on the main channel for now.
Hi, this is a minor update to fix some stuff with the custom mission support. Don't worry about the contains.
Also total result has been temporarily disabled until it's fixed.
Anyways, if you can, please check the custom mission here created from the SDK and try to play it. Specifically if you're a Steam Deck/Linux user.
https://steamcommunity.com/sharedfiles/filedetails/?id=3071279707