It looks like the problem is happening in a construction script.
If you have any code in the construction script I would start with clipping the execution line in your Blueprint, maybe it will stop crashing.
Also I suggest that you don’t have any code in the construction script unless you want to show something in the level editor.
BeginPlay is much less prone to crashing the engine.
Maybe you can open the project file in some other (or empty) level that Blueprint is not in.
Else you might need to move it and hope you can open it again or worst case delete the Blueprint and start again.