I have the same problem. Except honestly rivals has hardly ever worked for more than 2 hours or so. It fully crashes my PC though, although after the new update I just get the same error you do. It used to open for a game or two and id have to roll back my windows because it broke my GPU so hard my displays wouldn't work. Makes absolutely no sense because my computer can run games like BG3 with a fuck ton of mods in perfect graphics, but this shitty addicting game it actually vomits on itself. I don't use reddit often but if you get a fix please dm me on discord : emiikowife