I am continously getting this error and am unable to add app for review. I have checked View All Sizes in Media Manager and removed any screenshot that has not been uploaded.
I did a test and remvoed all screenshots and still get the same error.
What should I do to move forward?
I did a test and remvoed all screenshots and still get the same error.
AFAIK, you need at least one screenshot.
I would advise to add screenshots one by one (the "same" one in each format) and see what happens. Thay may help you find which one cause problem.
You are not the first to report similar problem. If that doesn't work, you should contact support.