Upload failed: Your Instant App APKs should contain at least one base APK

Question

I need to prepare an Alpha testing for an Instant App and It run like a charm on Android Studio but It is failing when I try to upload it to the PlayStore, saying:

Answer 1

Yeah!!! I found the issue!!!!(and its not in any of the google help documents)

The issue was that I was dropping the instantApp apk file straight away. The solution is to create a zip file with the instantApp apk and the base apk and drop that zip file!!!

Thanks for your help!!! At the end the issue wasnt gradle or the code..it was the PlayStore :)

I hope that if anyone has the same problem this question can help them!!!