Blank Google Billpay popup

[MKrati]

I am a novice programmer and wanted to implement and test your library. For this purpose I did the followings:
1- established a play account
2- uploaded the app with the LICENCE_KEY that I obtained from play to satisfy
billingConnector = BillingConnector(
context,
LICENCE_KEY) //
3. Added android.test.purchased and android.test.cancelled as the consumableIds
3. I receive three callbacks upon connection - onProductsFetched and twice of onPurchasedProductsFetched
4. billingConnector returns true for isReady
5. I proceed to purchase android.test.purchased using billingConnector.purchase(this, "android.test.purchased") method
6. A pop up screen opens, it is completely blank and white. No other information
7. when I swipe it I receive ErrorType.USER_CANCELED event

I am puzzled as to why I dont get google pay screen. Samples like trivialdrive i've downloaded from play store brings up the play payment screen, thus my phone (motorola ace ) is properly set up. I realize i may not be able to test the functionality using the developer phone, but is that the case I am not sure.

Why I am not receiving the populated payment screen?

Any help and directions from you or the community will be immensely appreciated. Thanks

[akardas16]

try to publish your app in closed beta channel.