using some tracks crashes to desktop (crc error)

Hello,

When I try racing at Nordschleife and Montreal the game crashes to desktop and the following error messge appears (see screenshot)

any idea? So far, I've encountered this issue with these 2 tracks only
Nordschelife used to work some months ago, while this was the first time I was trying to race in Montreal

Have a nice day

 

Try to do a Steam file integrity check
How to Validate Steam Cache or File Integrity - MajorGeeks