Was the Afterburner overlay which shows FPS enabled?
Overlays, fps limiters and graphics enhancers tend to hook into the process and can cause all sorts of problems and are a good candidate to deactivate when crashes happen.
This should go into here:
https://forums.faforever.com/viewtopic.php?f=3&t=13963#crash
(and the thread needs to be ported to the new forum).
Would also suggest we make multiple pinned threads for:
Account / website issues Client issues Game issues (including crashes, ingame and sound problems, explain how to test with "/nosound")This would increase the chance of people reading these because right know they need to scroll through stuff to find the "Game issues" section for example.