Unreal Editor 4.11.2 Crashes During Project Startup

Hello,

My editor/project was opening perfectly last night, less than 12 hours ago. This morning I go to open my project and it crashes at 93% and I get the following error:

"MachineId:772444E9422D273D3CE8F2AAEEBCDC91
EpicAccountId:320a54457a754418a5dd130eeca0e2c6

You do not have any debugging symbols required to display the callstack for this crash."

Not very helpful or useful in tracking down the source of the problem. Rebooting didn’t help, and I wasn’t having any issues with crashes prior to this morning.

I tried opening another 4.11.2 project and it worked fine. So I went back to my autosaves file and tried replacing assets. I started with the map asset first and that didn’t help. So then I went back to what I worked on last night, my church asset, a blueprint comprised of small static meshes which are assembled to form a church. Replacing this with an autosave from 20 hours ago worked, and the editor now starts every time. The main difference on this last iteration of the church is I changed the pew models to be one instanced mesh component instead of 42 separate static meshes. Again, last night I had no crashes or issues in either editor or PIE. It only seems to crash today, during the startup of the editor.

I’m not sure if there is some issue with the instancing, but I’d be willing to provide the project files to Epic (including the backed up and crashing version of my church asset). However, it is over 40GB in size, so I’m not sure how I’d go about it.