All materials went to the dark side :(

Hello there!!!
I have been trying to compile my proyect for a few weeks and after several fails, all my materials went super dark, and i have no idea where to look for a solution xD. I dont get any errors in the material so i dont know what should i do :(.
Thanks in advance if anyone has any idea haha


well if anybody finds in the same spot, i fixed it by creating a new project and copy the content folder to the new project and vualá! all beautiful again!