Well...you were lucky for a while. The app has finally recognized that you aren't on your home network where your subscription to cable tv is active.
You can use your Spectrum log in info to get access to most networks' individual apps while outside of your home network.
They do this on purpose cuz they want spectrum stream package to be a failure by saying not enough people were interested.
No one is interested in an app that breaks weekly
- and when are they going to make the my spectrum app work for twc users since with the my twc app phone notifications don't work?