Well, the error is as vague as it can get. Basically, I installed, played, exited to the menu, exited the game, went back in and when I click load.. this happens. The music continues playing but as soon as I click Ok... back in the desktop. If there's an error log generated please tell me where I can find it. :) 
I also get the FATAL error on loading. Played yesterday evening, now wanted to continue.
You can find the UE4 Crashreport zipped here: https://c.gmx.net/@334030562350077263/CG1-vZ2XSBiycD3A2zvvzw
If you need more info, feel free to ask!