In App Purchase2 - Google Play Something went wrong on our end

I am trying to make the in app purchase 2 plugin on my app. But then when I click my purchase button it always said that. “Something went wrong on our end. Please try again”

Is there anything that I need to do? I already check some things like, verifying that the productId is correct and if its active. Using a test user, etc

do you find solution???

In my case and probably in your case you actually need to publish your app on the play store in order for it to work.