Marketplace meshes not assigned to level dragged into Level

Hi there. So I’ve downloaded a couple of levels (maps) from the marketplace into my project folder. Whenever I try to add those levels to the Levels Window, all the assets are added to my World Outliner, however the meshes and assets are not assigned to them; they are all blank. Is there any reason why this might be the case? This happens with 3rd party as well as Official (Epic) level examples. Thanks.

EDIT: I should mention that when I open these levels when no projects have been loaded, they work fine.

Figured it out! The trick is to NOT copy the entire folder (project and all) and simply copy the “Content” folder ie: the folder that has the actual blueprints, meshes etc. Everything showed up after that.