I can not join the CS: GO waiting room

Hello,
I have a problem with the CS: GO account, and for some time now I can not join any waiting room, but if I create waiting rooms everything is as it should.
When trying to join, this pops up. DISCONNECTED. Failed to join the session. try again

I would suggest striking on the CS: GO steam forum / send a request to support.

And how to do it?

Here you have a discussion link on steam https://steamcommunity.com/app/730/discussions/ Alternatively, if you write a colleague, go to some Polish forum about CSGO.