That worked for me on KaliLinux 2020.3:
https://forums.kali.org/showthread.p...ght=AWUS036ACH
After a lot of failed attempts...
I found a working solution.
and here it is...
follow these steps as it is.
NB: Unplug Your Wi-Fi Adapter while You Doing Below Steps.
? apt remove realtek-rtl88xxau-dkms && apt purge realtek-rtl88xxau-dkms
? apt update && apt upgrade
? apt autoremove && apt autoclean
? reboot
? apt-get dist-upgrade
? reboot
? git clone
https://github.com/aircrack-ng/rtl8812au
? cd rtl8812au
? make && make install
? poweroff
Now Turn ON the PC and Plug Your Wi-Fi Adapter
Now, I'm Using Alfa AWUS036ACH RTL8812AU on Kali Linux 2019.4
NB: I connected Internet through this Wi-Fi Adapter...