Game crash on 'load level' or console command run from widget

Hi everyone,

I’m running through the UI tutorials for Unreal and I can’t seem to execute the quit or return to main menu without the game crashing
https://docs.unrealengine.com/latest/INT/Engine/UMG/QuickStart/5/index.html

getting this error in the attached image:

I’m not sure if something else my project dies is related but i don’t believe it to be the case as the console command refuses to work as well to just quit the game, but any help would be appreciated as i’d like to avoid calling a load level from another blueprint (if that woudl even work as a workaround)