After Updated my machine I can't connect to Wi-Fi. Even if not shown in the bar or setting. For this reason, I Completely format and reinstall the ubuntu 20.04 version. Then the same problem occurs after the update.
Linux kasun 5.8.0-36-generic #40~20.04.1-Ubuntu SMP Wed Jan 6 10:15:55 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux
ps: There is anyways to go back to a previous version or any other solution