Code (Error: TVAPP-00500)

I’ve look through all of the complaints & never saw a resolution. Which is sad. This is the 1st time in over 10 years that I’ve tried cable (because it’s pointless at this point) but I compromised with family & tried it again & what a disappointment! I can’t my Tv App to show the channel line up. I tried Xfinity chat & AI is even worse with trying to assist since it has absolutely not a single clue what this error even is. To clarify everything I’ve tried. (So please don’t respond asking me to try them)

Its a Roku Stick

I’ve:

unpuggled the Tv

restarted the App

signed out

uninstalled the app

Re-installed the App

changed password 

checked for software update (on both the Roku & Xfinity App)

unplugged modem?
Did I miss something? 
I’m def canceling. I’ve proven my point that cable tv is not worth the cost