Solved

Parts

I have just tried to fix car and replace engines, and despite having 36 parts and 6 engines, i am getting a pop-up saying i do not have enough parts or engines...

It usually does not work after a race while the "go to race"-botton is still active.

My parts are not getting regenerated. When I go to repair I never get the new parts refilled. Previous to my last race (when I already suspected it was not working) I had 42 parts left after repairing my cars. The race finished, I refreshed the site (cleared the cache), and still 42 parts... if I check my headquarters it was supposed that the Manufacturing produce 7 parts per race (at my level).

Thanks @Christian and @Jack - i was clearly far too eager a beaver to update for the next race!

Feel you there, tended to refresh the page all few minutes in beta ;)

got to work on my patience :p

I'm having the same problem but my last race is over 5+hrs ago. I can't train or repair my cars