Just as the subject subscribe, my Pi 4B cannot connect with the Wi-Fi.
It works when I use NOOBS to install the system, but it cannot work when I entered Raspbian!
When setting the system, it keeps failing on connecting with Wi-Fi, and after that I tried to connect with the same Wi-Fi, it still doesn't work, telling me "Disassociated from XXX(The SSID)".
I tried to use the Personal Hotspot from my iPhone6S, it keeps on the same situation.
What can I do to solve the problem? I have no network cables at home, and also, the Bluetooth doesn't work with my iPhone.