Shaded wireframe showing proper shader but shaded is pink

You can see images from the same aspect here https://imgur.com/a/WBEZpjk

Basically randomly everything turned pink. I was literally doing nothing and it just flashed. Shaded wireframe works but normal shaded and the game itself is pink. I googled this issue and all I saw were posts about the new pipeline but I am not using that. Any idea what's going on here?

Thanks

 

@ezgoescat

For anyone else going through problems similar to this:

That might be a problem with the material. Or the link from the object to the material somehow broke. Note, this problem occurs in 3d software like blender too. Okay, replace/remove the material(s) that is on the object(s), and put another material, onto the object(s). That normally solves this strange problem.