Hello, last year i puschase the endurance pack and the 24h lemans. Now, in the game apears that i do not have the dlc abd the track to, what i do in this case?
check your inventory in the Steam Store. That should show if you have the track & cars. If you do, use windows to delete the folders for those items in the installed\locations and installed\vehicles. Then rF2 should download a fresh copy of all of them.
Just to expand slightly on Dave's answer: Deleting them from the Installed folders will make rF2 install them again, and hopefully fix your problem, providing they are still in the workshop folder ready to install. If that doesn't happen, verify rf2 files in Steam to repair/download them, and hopefully rF2 will install them next time you start. If none of that works, check for error messages on startup, and check (or share) a trace file for errors.