First of all, I appreciate how easy it is to use. Thank you.

I just tried uploading the image again, and it still didn't work.
I think it's because I'm on an iPhone. The original file is IMG_3373.HEIC, but the failure message says it's IMG_3373.jpeg.
I think it would work if it was a JPG, JPEG, or PNG.

Neither Chrome nor Safari on my iPhone support image uploads.