Attempting to build from source reveals unloaded project

Hi all,

I recently onboarded a level designer and got them a build of our game to work on over P4V Helix Core Source control. They pulled the build without issue then generated the .sln file without issue. Upon opening up the project, the project file had an atypical symbol next to it with the text “unloaded” next to it in parenthesis. In an attempt to fix this I had him right click on the “Solution Branching Sickness (1 of 2 Projects)” and then attempted to “add an existing project file” to VS with no luck.

This has never happened to this project before where the project was “unloaded”. Any direction or things to try would be appreciated. An image is attached visualizing the problem.