Broken Google Hangouts Dialer topic

During some upgrades to Lollipop (5.0.1) and the newest Hangouts (2.5.816xxxx) and Hangouts Dialer (0.1.816xxxx), something got broken and I was stuck in this endless loop of error messages with the Hangouts Dialer.
"Phone calling is not supported for this account with this version of Hangouts."

Annoying! I had some issues with a Google Voice number, my cell number, and all the "seamless" integration Hangouts offers across all my devices.

To fix it
go to hangouts
hit the three lines in the top left
select settings
choose your gmail account
go down to Account under "Phone number confirmed"
reconfirm your number(s)

and that sorted out my Google Hangouts Calling feature.