How to Submit iOS App for Review - "There Are One or More Errors on the Page."

Unable to submit iOS app for review - There are one or more errors on the page.

If there are no errors and it just say, "There are one or more errors on page"

following can be solution.

Click on "Pricing" tab

and choose Price Tier as Free or your price

and go to your app again and Submit,
Cheers.

There are one or more errors on the page. on iTunes Connect

In short, had to add all images to "App Preview and Screenshots".
I just had this issue, and this https://stackoverflow.com/a/38887524/795114 answer helped me to resolve it.

Not sure why, but when removed other images and left only biggest for iPhone and iPad, this issue appeared. Seems almost like iTunes Connect bug.

Update
Now it worked for me. Successfully published new release by resubmitting all new images.

For more clarity, few steps:

Firstly deleting all images
Then enable "Use 5.5-Inch Display" (as also mentioned by Mashhadi)
Upload 5.5-Inch iPhone (and/or 12.9-Inch for iPad) images and press save

APPSTORE: Unable to submit the app for review. The items below are required to start the review process: An error has occurred. Try again later

I had the same problem while distributing the B2B app via apple business manager. After registering a bank, taxes, and Contacts, the error disappeared.

Goto App Store Connect -> Agreements, Tax, and Banking -> Agree the Paid Apps agreement.

Here you can see why do you need to accept a "Paid Applications" contract when updating free apps?

There are one or more errors on the page

You are getting this error because ITC has recently changed rules for uploading Screenshots.

Here are few things you should keep in mind :

iPhone:

For iPhone you must upload 1 set of screen shots for 5.5 inch device (1242x2208 size)
Kindly take a note that 1 set means you can upload 5 screenshots
You can upload screenshots of other devices from media manager. But only if your application have localization feature & you need to show other language screenshots

iPad:

For iPad you must have to upload 5 screenshots of 12.9 inch iPad device. (2732x2048)
You can upload screenshots of other devices from media manager. But only if your application have localization feature & you need to show other language screenshots

Now in your case i can see you are trying to upload iPad retina screenshots but its giving you error message.

Simply follow this things:

Ask designer to create one splash screen for 2732x2048 size & upload it. As because we can add minimum 1 screen shot so you will be submit the application by 1 screenshot only.
If you have added other device screenshots from media manager than make sure you have localization feature & in that case you have to select other language. Other wise remove that screenshots.

Important Note:

I already tried the same solution & got approval for my app. So its a tried & tested solution & its not on basis of assumptions.

Hope it will help to everyone.

How to submit the app for review after the current version of the app is rejected?

After the app rejection, only the admin or manager of the AppStore connect account can submit the app for review. I was assigned with only developer role and hence was unable to submit the app for review again.