As the picture shows, all my problems which have pictures in them cannot be rendered in Polygon now. What's weird is that Polygon can still resolve my pictures and render the statement properly in the morning. After creating full packages for my problems, those who have pictures suddenly report this error, while the other don't.

I also tried to convert images to JPG or GIF and upload them again. However they all don't work. I think it is not caused by the image. Does anyone meet the same problem?