iTunes Connect submit for review - Your app information could not be saved. Try again

Question

I get this error message when trying to submit a new version of my app for review:

While I've seen other threads about this error message, the solutions presented haven't worked for me and I haven't seen any mentions of the actual server error message I get. iTunes Connect responds with the following error message:

Error converting JSON string to object: Can not instantiate value of type [simple type, class com.apple.jingle.label.content.purple.to.LCSubmitForReviewTO] from JSON integral number; no single-int-arg constructor/factory method

Request details:

Remote Address:23.1.186.88:443
Request URL:https://itunesconnect.apple.com/WebObjects/iTunesConnect.woa/ra/apps/123456789/version/submit/complete
Request Method:POST
Status Code:500 Internal Server Error

Full JSON response:

{
    "data":null,
    "messages": {
        "warn":null,
        "error":[
             "Error converting JSON string to object: Can not instantiate value of type [simple type, class com.apple.jingle.label.content.purple.to.LCSubmitForReviewTO] from JSON integral number; no single-int-arg constructor/factory method"
        ],
        "info":null
    },
    "statusCode":"ERROR"
}

I've tried clearing all cookies, and also changing to another browser, and I've also tried removing the build and adding it again, but I get the same issue regardless. Has anyone else had this exact problem? Did anyone find a way around it?

Answer 1

I just tried submitting my app again, after 12 hours of being unable to. It worked!