Lubuntu Wifi problem

Greetings, just yesterday, for the first time in my life, I downloaded Lubunta (version like 20.04.4, but in the console when I enter the isb release command it shows 11.1.0ubuntu4), krch, I don’t know how to look correctly, but still.

The problem is, as I finished with the installation, I ran into a wi fi problem, I enter the password (correct!), And it refuses to work, first it shows on the pages, they say there is a DNS error, then it’s completely that there is no Internet, I tried to restart many times - nothing , in the end I use the wire, but it is not convenient at all, how can I solve this problem?

I don’t speak Russian but this appears to be a duplicate of:

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