Object folder not re-integrating with project.

Hello,
I'm having an issue where an object folder has been accidentally moved out of the Game directory in Windows Explorer. The game was loaded once without it but then readded. Usually when this has happened it has recognised the folder again instantly but this time this is not happening. All the objects are still in the folder, but Gamemaker is acting as though they don't exist.

I have tried the following:
-opening the game with Gamemaker open and through Windows Explorer
-Importing the...

Object folder not re-integrating with project.