Settings: "Update Apple ID Settings": press Continue, returns to "Update Apple ID Settings"

Settings icon on home page has red circle with 1 inside. In Settings, message says Update Apple ID Settings. Next page has message, "Some account services require you to sign in again." I press Continue button, next screen calls for Apple ID. I type in password; screen returns to "Some account services, etc." I press Continue again, the screen shrinks, then returns to the "Some account services, etc." window. Pressing Back to Settings, Update Apple ID Settings returns, with the red-circled 1. Back to home page, red-circled 1 remains.