Hello. I'm using a Free-for-Teacher account at my school. I have 2 courses that I would like to reuse this fall. I tried the export/import method last year but the quiz images in the new courses all have broken links. I have to edit each question and re-insert the images into the questions. And I have hundreds of quiz questions (lots of work). In some cases the images did did not transfer into the new course and I have to upload the jpg images into the new course and then re-insert the images into the quiz questions (even more work).
Sometimes when this happens its because the browser isn't loading the images properly, and not because the images or links themselves are broken. Have you already done troubleshooting like looking at the questions on a different computer, or clearing your browser's cache?