UE4 crashes every time I edit something

I was working on a project in UE4; everything seemed fine for a good hour or two, but suddenly (in the same session) when I opened an animation composite asset, it crashed.

After restarting and restoring the project, everything in the project-- models, textures, audio, etc., began causing UE4 to crash on trying to open up the editor for them.
They aren’t corrupted, because I can still spawn them into the viewport and they still work normally.
I seriously have no idea what I did.


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