One of the most common causes is a mismatch in permission levels between Steam and Assetto Corsa.
Right-click on Assetto Corsa and choose 'Properties' 3. Click on 'Set Launch Options' 4. and put the values in there. eg. - cpuCou... Steam https://help.steampowered.com Verify Integrity of Game Files - Steam Support * Restart your computer and launch Steam. * Next, you can either right click the game in your Library, or click the gear icon from... steam api failed to initialize assetto corsa