I'm guessing it has to do with the new website but not 100% on that. It's been a while since I fired up iRacing, however when I turned on SimCommander, instead of logging on I got blank name and password. I tried resetting password to no avail. I had to re-register on this website because my old credentials failed to work.
I did send in a request for help and in my experience with this company, service has been second to none.