Error pops up while racing

I got two times this message while racing....(Iracing)Attachment 228
what does it mean and how can I avoid windows poping up during a race ?

i can't read that message - the image is very small

https://1drv.ms/u/s!Ai__A4W0YU7nm00G...tkA3e?e=zUJCkA

Wow... thanks for this. Turns out I built the last release in 'debug' mode - I'd have simply never spotted it without that screenshot. I think there were other issues triggered by this mistake too, so thanks for taking the time to post it.

I've pushed a new release with this disabled (and a couple of other bugs fixed).

When you get a chance to test, I'd like to hear the results


thanks :)

I have to say thank you for the quick answer/help. I did two races and everything is fine :) Great software !!