Ring doorbell app won't work iphone 17max pro ios 26.1

upgraded to iphone 17 max pro and ios 26.1 Now my ring doorbell app won't work. When I try to log in, I keep gettng an error page marked "406 Not Acceptable" I have deleted the app, reinstalled it and it persists. Restarting iphone has no effect. I've allowed popups in safari, tried creating a new account, all to no avail. Anyone help?