How to properly upload .uproject to Google Drive

My BF is a stubborn fool, so I’m here to ask for him:

His professor at FSU is making them upload their scenes into google drive and then ‘submit’ their assignment to him by sharing the link (when in the past he’s always just submitted .zip files of all the scenes assets with the finished scene). He has the files. The original file he’s worked on opens for him in Unreal. But as soon as he uploads it to Google, then downloads the file from Google, it loads a blank scene no matter what he does. And the professors response? Basically just ‘keep trying, stupid’ without any actual instruction.

Anyone have any advice? We’ve tried looking it up ourselves and google drive obviously isnt ideal, but its what he has to use.

Here is the google link he’s shared if anyone wants to look and see -