Did that per suggestion from Support after I asked them again.
I still see just three 'wait' spinners with either Firefox or Safari if I click the "Connect" button on the page https://ovpn.sonic.net/?src=connect
EDIT: as of 4/11/2019, the problem went away. I'm reviving an older Mac after the 2011 MBP's graphcs failed as they do. Went through the whole setup, downloaded the latest application version, so far all good.