Spectrum App Error IVS-1001 on iPad and iPhone - TWC TV and Apps

Since iOS 11 update, Spectrum App for iPhone and iPad displays error message IVS-1001 after streaming live TV for 10-15 mins.
1. I have deleted and reinstalled the app on both devices.
2. I have deleted the app, restarted both devices then reinstalled the app.
3. Done both 1 & 2 and reconnected to home network again.
4. Done both 1 & 2, turned home modem off for 1 min then restarted it then connected to home network.
Help! Everything worked a week ago

This question is about "Spectrum App Error IVS-1001 on iPad and iPhone", with Time Warner Cable TV and apps.