I can't update my payment information, I get an error, or it doesn't load, even though I updated ios to the latest version
iPhone SE, iOS 13
I sure you have done things correctly, but here is the best information I have on your topic: Change, add, or remove Apple ID payment methods https://support.apple.com/en-us/HT201266
Same here, everything worked fine a few days ago but when I tried to purchase something today it said I had to update my payment info.
Do you have access to another WiFi network where you can try? That has worked for several people.
Try a restart.
Restart your iPhone, iPad, or iPod touch
Try a forced restart.
If necessary
Do a backup and try a factory reset. Then restore from your backup.
Backup - Restore your device from an iCloud or iTunes backup.
If necessary, contact iTunes Support.
Payment information
