Failed to Open Map File Error across two computers

Hi, I’m getting the “Failed to open map file. This is most likely because the map was saved with a newer version of the engine.” The thing is, I only have one engine version installed across two computers and have been using Github to upload/download the repositories. All the files appear to be there but the map won’t load. The project still loads fine on the original computer.

Possibly relevant: I recently followed a tutorial to make a custom content pack with my own assets and added those to the engine under “Featurepacks” and “Samples” as instructed. Is there something in there that could be causing the map to not load if it uses those assets? I’ve tried deleting them from the projects/making sure I have the same pack loaded on both computers, but I get the same error regardless. If it is related, how can I avoid this happening in the future?