Read the forum guidelines
Can't get NBC Sports to work on Windows 10 PC, Apple TV, iPad, or iPhone. Spent 20+ minutes on the phone with Cox and they verified that NBC Sports is part of my plan.
NBC Sports website says "It looks like your TV subscription does not provide access to this service. Please contact your TV provider for more information."
iOS apps say "Authentication Error: We're sorry, it looks like there was an authentication error."
This problem has been happening for two days now.