I've had a Home Use license for several years. My 12 month period ended late last month and so I purchased another 12 month license as I always have. I had still been using v10.4 (for no real reason, just to avoid uninstall/install process). Anyways, I tried installing 10.7.1 and while the software itself installed with no issues, the authorization process bonked with this error:
Underneath the red block is the authorization number that was provided with my latest Home Use license purchase. I thought maybe there was some weirdness with my old 10.4.1 still maybe being installed so I tried uninstalling all ArcGIS software, restarting, and then installing 10.8 but I still get this exact error at this point. I've tried authorizing via the Internet, I've tried creating an authorization file and then specifying it- it all ends here at the same place.