Manage Apple ID site giving me unknown error

Were you able to find anything on this? I'm having the exact same problem, although I started troubleshooting this from the "The iTunes Store is unable to process purchases at this time. Please try again later." side on my phone, and then discovered that same problem you're seeing on my overall iCloud account, and that I can't actually connect to my iCloud account from my phone. Also noticed that my phone seems to be stuck on "iCloud Drive: Upgrading..." status.

Seems like something "broke" on Apple's side yesterday, and unlike in the past where this problem cleared up after a few minutes, it's now been almost a full day.

Whatever it was, it is working now for me. At least on mine, it was definitely related to the payment information, since that was whacked out everywhere I looked, and even on the AppleId web site, watching the Browser console when viewing my account information showed that the Apple web server was returning a Status Code 500 (internal server error) when the browser was querying for the "payment details" section.

One thing I did notice last night was that the formatting of my phone number on my credit card seemed to be wrong when it was displayed inside the "Payment" section inside the App Store on the phone -- the area code and number were all jammed together into one field and the screen kept telling me the area code was missing. Meanwhile, at that same time, while I could view my "Payment Details" screen from inside the iTunes application on my Mac, the formatting of the page was all wrong -- it looked like the HTML was there, but the CSS was missing. I updated (and changed) the phone number on my credit card inside the "Payment" section inside the App Store on the phone and saved it, then a few minutes later the iTunes screen displayed properly, and displayed the new phone number. Everything else was still broken at that point; it wasn't until sometime today that things started working. Not sure if this was a coincidence or related, but wanted to pass it along, in case it might help.

Have you gotten any updates from Apple Support?

Having the same issue with my fiancé's iPad.

Unable to update apps.

Unknown error when logging into appleid.apple.com and payment information isn't avaliable

Thanks

So far (keeping my fingers crossed as I write this), since I updated my "messed up phone number" using the payment section inside the "App Store" on my phone itself, everything has been fine on my updates, and I've done several update passes. I had been having that exact same intermittent "Unable to update" problem for _months_. I would try to update and it would give me the "Unable to update" error, I'd wait a while and try again, and everything would update fine. But then a few days later I'd have the same problem. It wasn't until I posted my response above that the "wait and try again" didn't work - no matter what I tried then, I couldn't get past it.

Venturing a probably completely wrong guess, but it _feels_ like Apple has several replicas of the database with our payment information (or several data centers), and one copy had bad payment information. In my case, if I was unlucky enough to be connected to that data center or database, my phone/my apps wouldn't update. When I waited and reconnected, if I happened to now connect to a "good" database, I could update. When I updated my phone number (my payment information) via the iPhone App Store app, that seems to have forced a database update to all the database instances and corrected all the data. (I never actually filed a support ticket, so I don't think Apple did anything to fix my problem, unless someone just happened to see my response above, forward it to the right person, find the problem, fix it, but then not notify me.)

Of course, I might have just had a few days of good luck, and I might now have just tempted the gremlins of Apple Fate by posting this, and I've now caused them to decide go wreak all sorts of havoc again with my updates...

So update to my update below: I clearly tempted the Apple gremlins - my problem is back.

It would be nice if Apple could fix this. It's been going on (on and off) for a few months now...

Now of course I also now need to hold of updating to iOS 10.3.3 until this is fixed in case I need to update any apps at the same time (although updating iOS versions seems to have become a risky proposition in its own right...).

<sigh>

One more update: Interestingly, I _can_ update apps over cellular / LTE data, but not over WiFi.

Normally I block "App Store" from being able to access cellular data, but just tested it now. 100% of the time, 6 different tests, 6 different apps:

* Enable cellular access to App Store / disable Wifi : CAN update apps

* Block cellular access to App Store / enable Wifi : CANNOT update apps: "The iTunes Store is unable to process purchases at this time."

Power-cycled wireless access point (via "the BIG reboot": unplugged it, waited 20 seconds, plugged it back in); power-cycled cable-modem, power-cycled home firewall. No change. Hard-power-cycled phone. No change. Can't update over WiFi. CAN update over cellular.

Then you may wish to reach out to Apple Support -- Contact - Official Apple Support

What browser are you using? Have you tried using another browser or perhaps clearing your cookies/cache? What about restarting your device?