found the error while try to change apple account for purchase and subscription, and could not complete because it just hang on the pop up error.
while try to change apple account for purchase and subscription
Your Apple ID is the personal account you use with all Apple products and services. It includes the email address and password you use to sign in, as well as the contact, payment, and security details that you use with Apple.
Keep in mind -> You can’t merge multiple Apple ID accounts.
See this Apple article: Change your Apple ID
Change your Apple ID - Apple Support (SG)
and could not complete because it just hang on the pop up error.
If you get a message -> Your purchase could not be completed, you need to update your payment method or add a new one.
See the following Apple articles:
Payment methods you can use with your Apple ID
Payment methods you can use with your Apple ID – Apple Support (UK)
Add money to your Apple ID balance
Add money to your Apple Account balance – Apple Support (UK)
See also -> If you can't connect to the App Store, iTunes Store, or other Apple services
If you can't connect to the App Store, iTunes Store, or other Apple services - Apple Support
-> If you tried all of the above steps and you still can’t connect, contact Apple Support.
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