I just tried the following:
1. All Stages were done off-line
2. Started with SS01, completed the Stage.
3. Started all Stages SS02 to SS07, but quit each one after about a minute.
4. Drove complete SS08.
I had no problems with error messages, all Stages loaded ok.
Probably not what you wanted to hear. I haven't tried setting up an on-line test Rally though, but I believe Rick's test Rally went ok without errors.
Same for me, everything works fine.
Try setting up an online rally, and when (or if) it crashes, try to restart and rejoin the rally. Maybe you can resume without losing anything?
I can set up a test one today. If anyone needs it, let me know.