I have always been able to max out the game and run it perfectly fine, but ever since update 0.3.7.3 I could only make it to the main menu. Trying to load into a lobby would result in a "Fatal error!" with no further information, or a "LowLevelFatalError" attempting to build nav collection data. If I turn off High Quality Shaders, I can join lobbies perfectly fine again, then after I load into a lobby I can turn the option back on and it will work perfectly fine.
Again I've always been able to run with this option on prior to this patch and I apparently still can after I load into a lobby, but if it's enabled while I'm loading it will crash 100% of the time. I don't understand it and its only started happening in the recent patch.