No Signal, Zwift hub

I’ve seen posts about No Signal, but no real resolution.
Using PC app with Zwift hub. The bluetooth connection is confirmed.
Have reloaded app on PC. Cycled the hub power, cycled the PC power.
This was working one day and then not the next.
It will bluetooth connect to my Iphone.
Help - I miss the larger screen and can’t read the cell while riding.
Thanks Zwifters -
Eric