My Illustrator file appears all black

Hi guys. I have a huge problem when i’m import my Illustrator files into Toon Boom, it appears all black solid color, even i changed the color still keep black, Why this problem? Is It my pc or any TB configuration?

unfortunately , the post did not help me . I still have problem about the colors.

Does “Render View” look any different ?

The renders (render view and open gl) show me only black colors, i cannot understand why

Any chance you can provide a download-link of your project file ?