What happen to my project (weird material :( )

i swear i dont touch anything ! Before this happen everything work perfectly fine. I built with the high quality lighting before and no probllem everything look realy good. Then i go out with my friend and when i come home turn on UE4 to countinue the project, this happen :(. It cant be the lightmap cause everything work before, and look at the red mark, the new material preview look realy weird, even some old material too :(. i even tried with another project, all ok except this @@

Can anyone help me pls?, im thinking about create a new one cause i cant find the solution