The first clues I see in your log output are:
- “Error: PrimitiveComponent tried to render with Material MaterialInstanceDynamic_0, which was not present in the component’s GetUsedMaterials results”
- “Error: Owner: BP_Particle_Snow_13, Resource: P_Snow”
I can’t be entirely sure, but those two issues (near the top of the call stack) seem to suggest there’s a particle system blueprint called “BP_Particle_Snow_13” in your level that’s attempting to use a dynamic material instance of some sort, but failing in a critical way.
Try to find that blueprint and open up its graph. Look for any graph nodes that pertain to dynamic material instances, and try to debug from there.
Or, a simpler workaround might be to just remove that blueprint from your level for now. If you choose to go this route, make sure you remove all instances of that particular blueprint from your level — there’s probably more than one. If removal prevents the crash from reoccurring, then you know that specific blueprint is the culprit.
Good luck with the debugging!