Error in Add Funds into Apple id in Iphone13.

Hi there,

First, you should let Apple know about this issue: Feedback - iPhone - Apple

You can easily add funds to your Apple balance with a mac, any other Apple product or a PC: follow instructions here --> Add money to your Apple Account balance - Apple Support

Some things you can try.

Try a restart.

Restart your iPhone   *

Restart your iPad.   *

Try a forced restart. See the section towards the end of the article.

Reset Device. -

If necessary

Hard reset.     -

Do a backup and try a factory reset. Then restore from the backup.

Restore to Factory setting.      *

Restore - If you see an error when you update or restore your iPhone, iPad, or iPod.   *

Backup - Restore your device from an iCloud or iTunes backup.     *