Cannot upload. A little window pops up saying "error" with a red line that grows to extend across the top while the image transmits. I will try with Firefox.

Firefox displays more in the window, below "error" with "request entity too large". The PNG file is one megabyte. So two problems exist with the application: accepting a reasonably sized image and difference in messages between Chrome and Firefox. I will shrink to a JPG and see if that works.