Netflix no longer recognizing credentials

A few months ago I added my existing netflix account to my optic TV package, was working without problems up until this week when I was logged out of netflix on every device and when I go to login it says there's no account with my email address. I can still access netflix through the optic box but not on any cellphone or smart TV without a box. Kind of defeats the purpose of combining accounts if I can't use it on any devices.