How do I fix 'The asset '/Game/Maps/Level' (Level.umap) failed to save.' ?

[mclark4386]

@L.F.A

AFAIK, this usually happens when your level has an asset from the Engine’s folder, for instance, a sphere mesh was placed in the level, and its default material has been changed. You won’t be able to save this change. So copy the sphere mesh to your content folder, place in the level, and then you can modify it at your will.

I couldn’t find anything that stood out, any ideas on a good way to find the culprit? I thought it would be my “quest” actor because when I place it in the world it has that sphere marker that shows, but I don’t so any component on it that actually maps that sphere mesh so I’m guessing that’s just the default marker for a BP.