I have a Live USB with Xubuntu 22.04.3 LTS and Wi-Fi works fine there. I installed Xubuntu from this Live USB to the hard drive and booted from the hard drive, but now I can't connect to Wi-Fi.
Everything is fine with the Wi-Fi router. I am now using the Internet from the router on my phone. The password I entered is exactly correct. I did NOT change any settings, that is, the settings are the same as on Live USB.
My system is a Lenovo X121e with AMD E-450 and SSD memory.
What shall I do?