Steam Offline

Recently, I ran into a problem that when I enter the game, the inscription Steam is Offline, while I am connected to the Internet and go through Steam.

This has been going on for fifth day and I tried these things:

-Restart Steam
-Restart Router
-Restart PC
-Reinstall Game
-Verify Game Cache

Then this problem appeared:
I was recently given a VAC warning in Steam, but it was already removed from me and I can safely play other games besides the Tower.
If anyone can help me please do so here !