why my windows version stuck in loading screen?
Sorry, you are the first to report such a problem. Does this happen all the time?
YES
Does it happen during startup / while loading saves / just as the story progresses?
during startup
It's probably a problem with the engine. I have already updated it. Hopefully, the next game update will fix the problem and you won't encounter this issue.For now you can play WebGl version.
Same happens to me