Title says it all, I am using the latest version of Linux Mint, with an Archer T2U Plus usb. I can detect and connect to the 2.4g just fine.

I am using the morrownr 8812au driver from github. What might be the problem? I've heard I might need to add the 5g MAC address to my network manager, but I want to make absolutely sure it isnt like an option or toggle i have on. I had this same issue in MX Linux about six months back but still no dice.