Hey folks, I stumbled upon this useful app that automagically fixes the "your gpu isn't supported by this game" error whilst searching for a solution to it as I've just experienced this annoyance after I changed out my aging GTX 750 Ti GPU for a GTX 1660 Ti recently...
https://www.nexusmods.com/thesims3/mods/106You can actually fix this minor annoyance thanks to these guides...
https://www.carls-sims-4-guide.com/forum/index.php?topic=26753.0...and...
http://www.modthesims.info/showthread.php?p=4782510&posted=1#post4782510But having a tool that does the job faster is still worthwhile.
Too bad the author didn't even upload his tool on MTS or even here on MATY where more SIMmers go more frequently though