i've done everything you said, it doesn"t change anything...Your errors seem to point to a number of files/resources being missing.
Try starting a race from just the plain AC launcher (not CM) and see if that works. If yes, I'd try uninstall (completely, then reboot) and re-install CM.
If vanilla AC fails, uninstall and reinstall that. Even steam verified your files, seems like maybe something is missed somewhere or maybe something not written into Windows registry correctly.
I have a AMD RX580 8gb, I use the latest drivers which were working with Assetto Corsa before I reset my ssd. The game is without any mod, so CSP and SOL aren't install. I do use CM.What gfx card? Are you using the latest version of graphics driver? If not, update. If yes, try rolling back to a previous version you knew worked.
Also, are you using CM? What about CSP and SoL? What versions of CSP and SoL?
yes I reinstalled the game just now to re test, it shows me again that message, and since I reset my ssd, I tried to start the game from the previous file directory, i reinstalled it, and nothing works.Did you re-install the game from the scratch? if you have fresh Win install it may be missibng some vital files that are created when game is installing. Or you just tried to start the game from the previous file directory >?