can’t enter any kind of matches or practice range , it shows “applying update " and after few minutes an error appear “error applying update unknown error (0)”)”
Could you clarify which Blizzard game you’re referring to?
The mention of “Practice Range” makes it sound like this may be an Overwatch issue rather than a Legacy Games issue.
If this is Overwatch, you’ll likely get better visibility in the Overwatch support or bug report forums, where other players experiencing the same update behavior are more likely to see your post.