AndroidPublisher API return projectNotLinked error

Question

This happens when I was using Google Play Android Developer API in Google Developers Console to test the status of purchased product, and the result is always like this

Answer 1

I got this too and just gave up on getting it to work, instead switching back to v1.1 of the API:

final URL url = new URL(
        "https://www.googleapis.com/androidpublisher" +
        "/v1.1/applications/" + "com.example.app.id" +
        "/subscriptions/" + subcriptionId +
        "/purchases/" + googlePurchaseReceipt +
        "?access_token=" + googleAccessToken);

Hopefully someone will post a better answer sometime and we can all switch to v2 of the API.