One more thing to try, I have an old school digital camera with limited options on its own, and limited software. I use this site to reduce (no affiliation)
https://www.reduceimages.com/
They've added in pricing plans over the last couple of years but I have always (and am still) using them for free. Just drag your picture to the box and follow their prompts and suggestion reductions. Remember to download to your system after reduction. Then when you are here, is the upload. If you are getting the failed message you are so close! we just have to figure out the issue.