Are the apk(s) containing the asset_statements *published* in the Play Store? *
Important: Verify that your app manifest contains an android:name="asset_statements" under <application> with valid *escaped* json, and check that your apk is *published* in the Play Store (use an alpha or beta channel if needed for testing before release). If you are using the alpha/beta channel, make sure that this version of the apk has the latest version code in the manifest. Don't submit this form till the apk is actually published, otherwise nothing will happen!