IAP Badger - IAP fails 'error retrieving server information DF-AA-20'

I have alpha version published on google. I have 3 in app purchase products I believe setup correctly.  I have a tester email setup. It is an email that is not same as my google developer account email (as my original problems were supposedly caused by having the same email for tester as my google developer account email).

The tester email is added to the ‘Licensed Testing’ in accounts detail page, and license test response is set to ‘Licensed’.

In iap badger module the debug is set to false.  The license key from google is in my config lua file.

I believe all the steps listed in iap badger docs are set in build.settings correctly

But for 3 days of trying to fix this, every test try of the in-app-purchase from my Moto G5 phone fail instantly with this message 

‘error retrieving server information DF-AA-20’

I waited maybe 1 1/2 hrs since making a change to the tester account for this app on the google site before testing again … but still same error.

any guidance here is appreciated.

Thanks

Bob

using sdk 2017.3163    testing from a Moto G5   android 7.0 nougat

using sdk 2017.3163    testing from a Moto G5   android 7.0 nougat