Thank you for reaching out. I am sorry to hear you're having trouble converting your PDF file into an image. From your explanation, it sounds like this issue is a cache and cookies problem with your browser. A couple things I would recommend trying are closing and reopening the browser you're working in, or trying a different browser altogether. If neither of these fix the problem, I would then recommend clearing your cache and cookies in whichever browser you are working in. You can click here to see an article about how to do that. I hope this helped you!