Why am I getting this popup as soon as I click on install or update an app
iPhone 11, iOS 15
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Contact Apple Support about that, only they can help in this situation:
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If you see a message that says "Your account has been disabled in the App Store and iTunes," there might be a problem with the payment method that you have on file.
When you see the message, don't try to edit any of your account information. Instead, contact Apple Support for help.
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copied from: If you see a message that says 'Your account has been disabled in the App Store and iTunes' - Apple Support