I've got a very strange problem with the track Road Atlanta it works great in single player but when I try to go on any server's I can select the car but when I click race It wil just crash to desktop, although strangley it will work sometime but then if i try to change car(Skin) same problem. A fellow admin at RD also setup anothers erver with the same combo of cars at another circuit and it all worked fine and as I say it all works fine offline. I've unsubscribe from the track uninstalled all the mods associated with it made sure there was nothing left in the rF2 folder that I could see I also cleaned the CBash and Shader folders I then resubscribed to the track and reinstalled it but I'm stilling having the same problem. I also have just a clean install this morning but the problem is still persisting the first a ttempt after the reinstall it CTD but the 2nd attempt I got on I done few laps the when to Car select changeed the skin clicked race again CTD I've also added the last Trace report that was generated.
There were early reports with the latest build of crashes, and turning shadows off was helping people. As far as I can tell cleaning out old plugin files as per https://forum.studio-397.com/index.php?threads/reported-crashing-with-new-build.61857/ was doing the trick. You mentioned a clean install but I don't know if that means you actually removed/moved the rF2 folder so there wouldn't be files like d3d9.dll in there.