Crashes with any car, tried RSS stuff, stock Kunos stuff, all crashes. CSP v0.1.48, Sol v1.4.2
Your Oschersleben conversion works fine.
I don't see anything related directly to the track what would couse problems, try to turn off SOL and CSP and then run it, if it won't work, send me log file again please, if it will work, try to turn on CSP without SOL and run it, then CSP + SOL. I have feeling that there is some issue with sound subsystem, I used to have this kind of issues on latest CSP and SOL versions, I was able to run only certain cars on certain tracks, if you by chance have Caterham, try to run it with this car. Or one thing you could also try is to turn off ingame apps and see if it will help. Please let me know in which scenario did the track work.
I tried the track with the same CSP and same SOL version and the same car like you did and everything was fine, maybe there is something more than "merge meshes" in csp config what could couse issues.