COLORS DISAPPEARED IN 3D VIEW-ARCHICAD

[myheart]

hi im new to archicad and while i was placing roofs my materials just disappeared in the 3d view, does anyone know why? how can i fix this?

im using archicad 26 education version 

[hevi]

Looks like wireframe display mode is active - check the 3D style of the view and the layer settings for the view.