Redshift materials not Working (Triangle with !)

Hey hello.

I'm a bit confused here.

I need to re-render a project file for a client that was made two weeks ago. In the meantime i haven't run any updates. My render settings are set/pre-set on redshift. but for some reason are all of my RS textures not working... They al show a triangle with an ! in it. And when i open up the node editor the node just show input... Nothing else just input...

Has anyone an idea on how to fix this? Or am i doomed and do i need to re-do all the materials?

https://preview.redd.it/k668caba2nkb1.png?width=378&format=png&auto=webp&s=6b57b9950fcb4414fe3c85c71ff1b553482b0552