I wanted to submit my app for the App Store on iTunes Connect, but whatever I do I got this last message telling me there are still one or more errors on the page.
I was having the same issue i.e there are one or more errors on the page... and no indication what error is there. Finally I resolved it by traversing each option above. Though all i set was "Pricing" and as my app was free so i checked that option. Then i came back to the first tab and hit submit, and it worked, with no error.
For me there were 2 languages got selected and removed a one while keeping the default.
For me there was a tiny red Edit button for Rating in the bottom of the version tab. If you didnt answer questions to get the rating, you need to scroll down and fill that out.
Had the same issue and for me the solution was to go into the media manager and tick all the "Same as 5.5" screenshot check boxes. I only uploaded 5.5" screenshots. No IPad but I assume if you support iPad the same applies there.
I fix the issue by adding a cover art. scroll down at the screenshot page and upload the cover art.
You need to go into your "Media Manage" in itunes connect, and tick "Use 5.5inch display" for all the empty screenshot sizes. Do the same for iPad.
Hope this helps.