On my iPad (iOS 12.2), I'm trying to update my existing apps. The app store requests that I authenticate with my Apple ID password. It then brings me to my payment information screen, where it asks me to configure my payment method.
I select "None" on the payment method screen, since I'm only planning on updating apps and installing free ones on this iPad for now. After clicking "Done", it pops up the Apple ID authentication box again, which brings me back to the payment method screen, and this loop continues forever. I can't update my apps or install any new apps, even free ones.
In my App Store settings, I have disabled the "Require Password for Free Downloads" setting, but it doesn't make a difference. I can't install or update free apps.
Best Answer
In the past, I had set my payment method to be a pre-paid Visa gift card, which I used to download several paid apps. That card no longer has a balance at this point. This seems to be what was causing my problem.
I was able to fix this in the Payment Method screen by adding a new credit card (I used my real one) and hitting "Done". At this point my apps started updating and I wasn't prompted to enter my Apple ID password again.
After I entered the valid credit card information, I went back in to the Payment Method screen and set it back to "None", which worked. I can now install and update free apps.