[UbuntuGnome] GNOME; Wifi keeps disconnecting almost immediately.

Hello everybody, (I'm new in ubuntuforums, sorry for any mistakes)

I've installed Ubuntu Gnome, but keep running into difficulties concerning my Wi-Fi.
After I start up my laptop, the Wi-Fi is turned off. I can turn my Wi-Fi on by using 'Select Network' or 'Wi-Fi Settings', but every time the Wi-Fi is almost directly turned off (within one or three seconds). On one occasion I could briefly see my router, before the Wi-Fi was turned off once again. This suggests my wireless device can operate, but keeps being shut down.

iwconfig gives;

lo no wireless extensions.
wlx0060b3373e89 IEEE 802.11bg ESSID:off/any Mode:Managed Access Point: Not-Associated Tx-Power=20 dBm Retry short limit:7 RTS thr:off Fragment thr:off Power Management:off
enp0s20 no wireless extensions.

sudo rfkill unblock all

at the same time I had Wi-Fi Settings turned on in the background. I could see that the switch for Wi-Fi turned on for a second, but turned off directly after.
I've searched the internet for a solution (for days now), but keep getting the same result.
Can anybody help?

Using a