Matchmaking does not launch a search

Hello, I have a technical problem, I can’t play the game normally for 2 days, matchmaking does not launch a search, and the last game in which I acted as an observer still weighs in " spectate games"
Steam, win 10, checked the cache, reinstalled the game there are no problems with the Internet

Seems like the step i would recommened to try are already done by you, so i have no idea. I hope someone else can help you.