Throwing my voice in as well.
This has happened to my project, no meta human, just manny being used.
I noticed the crash would happen when toggling customdepth stencil settings on the player blueprint. On reopening the project, the root component is changed, the mesh component is completely empty, including the details panel being totally blank.
Only way to recover was through gitlab or from the autosave directory, nothing in editor will fix it. Unsure how to proceed as I cannot use the customdepth pass on my player without this occurring.