For those of you who just want to update your apps on your iPhone/iPad and also have a Mac that you can connect them to, this worked for me:
Install Apple's MacOS App from the MacOS App Store: Apple Configurator 2
Run Apple Configurator 2 and Select the device you want to update and make sure you are logged in to your iTunes account inside the app. You might have to log out and in again if you are a previous user of the app.
Choose Apps, then scroll down (it helps if you sort the list by name) to the app you want to update and choose Add.
It will tell you that the app is already installed and ask if you want to Replace it. When you opt to Replace, the latest version will be installed and the number in the red badge on the image of the your device on will be decremented by one.
Repeat for all apps that you want to update.
Configurator is only an option for iOS. Can't update my Mac Apps too.
Now it becomes annoying, because there is no response from Apple. Don't know if Apple search for the cause or not.
The fastest way using Apple Configurator 2 to update the app is to Run Apple Configurator 2, click Actions > Update. There will be an option to update all apps.
Does anyone know a work around for updating Apple TV apps other than deleting and reinstalling?
The Apple Configurator 2 solution may work with Apple TV, since it is a supported device.
Have done it on weekend. But also make rants herePeople need to contact Apple Support. Posting here or on Twitter isn’t going to do anything. Make sure you have Apple Support escalate a ticket to engineering. That’s the only way this issue will get noticed.
That option doesn't appear to work for some, if not all, of the people experiencing the issue. It didn't work for me and I had to update them using the Add method.
This is @_leetgeek_ from twitter. I can confirm, as others have stated, iMazing deff works for updating your apps on the iPhone and iPad. The Apple TV though unfort does not work with this program as far as I know.
At this point, I’m nearly convinced that having made an in-app purchase in a TestFlight app with a real Apple ID used to log into the App Store in the past is what is causing this problem.
I reached out to 2 people who newly posted about this problem on Twitter today and both said they have done so. There’s too many people replying that they’ve also done so for this to be a coincidence. I know some people have said they haven’t, but I feel either they did a long time ago and forgot or they aren’t experiencing the same problem.
Myself I made an TestFlight in-app purchase 9 months ago and was not logged into the Sandbox account at the time this issue started, so if that is the cause it will likely eventually affect anyone who has ever done so in the past.