Xfinity stream on Firetv “connection error…”

Trying to make the xfinity stream app work

your local office rep told me to do this after my satillite xfinity dvr box broke.  

Brand new Firetv 4k stick

all updates applied.  OS Version 6.2.9.7

xfinity streaming app on firetv  version 7.6.0.6

running on arris router with netgear Orbi rbr850 5G mesh 

The comcast dvr box itself is running on this same network as well as the app on an iphone.  The iphone is even on the same mesh.   

all other apps are working on the firestick so dont tell me its the stick or network.  

your app is throwing an error “connection error please check your connection and try again”  when hitting the opening Sign in screen

i have already Uninstalled and reinstalled the app several times including both soft and hard reboots.   I have also cleared the cache and data in the app settings.   Same result, it does not go through to the sign in page but blocks on connection error