When I open my saved project file all my puppets and elements are replaced as shown bellow.

This CYMK box thing has replaced all my puppets and is still present when I issolate the puppets in the rigg window. I have tried restarting both the softwear and my PC but the problem remains unchanged. I dont have the slightest clue how to even begin to fix this.
any help that would help me fix this problem and save me from failing my assesment would be really apreciated.
Thank you.