I’m not really sure why the original thread was marked as spam, but the problem seems to be happening more often on Hostinger and the last time I debugged it, it seemed to be connected to their CDN. They seem to be running GitHub - imgproxy/imgproxy: Fast and secure standalone server for resizing and converting remote images there in some form, which produces those errors for URLs that look like images, but aren’t really. In this case, the Panel URL has an image file extension but is actually a regular Kirby Panel route. The imgproxy seems to intercept that and then break because it’s not actually an image.