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Please use the thread tools near the top right of the page to mark as solved. That source code will work for the following device ID's

0846:9054
20F4:809B
20F4:809A
2357:0106
0BDA:8813...

That one should work with kernel updates. It also works with quite a few Realtek chipsets RTL8812au, RTL8814au, and RTL8821au
I used it on Mint 19 and now Ubuntu 20.04 with my Edimax AC1750 USB wifi

Ok, lets ditch the rtl8812au-dkms

sudo apt remove rtl8812au-dkms
Install something that should work

sudo apt install git
git clone https://github.com/aircrack-ng/rtl8812au.git
cd rtl8812au/...

See the wireless script link in my signature and post results

OK do
gedit admin:///usr/src/rtl8812au-4.3.8.12175.20140902+dfsg/dkms.conf
Change the line MAKE="'make' all" to
MAKE="'make' all KVER=${kernelver}"
Save and exit
then do
sudo sed -i...

Split from https://ubuntuforums.org/showthread.php?t=2439884
Please post results from terminal for
modinfo 8812au; uname -r; cat /usr/src/rtl8812au-4.3.8.12175.20140902+dfsg/dkms.conf