Uploading photos no longer use jpg / dpi but kb and I have no program that identifies a picture in kb's When I paid $10 per photo I had no problem now that it's free I can't post. I guess you get what you pay for :-)
J.P. Use this free program. It will identify the KB. Just upload a photo, do one little minor change, and save it not as a jpeg but as a PNG file. The PNG always increases the file size to the point of your image being above the 50KB limit set by IMDb. The free to use program is here....https://pixlr.com/x/