When running my angular (ionic framework) app locally, via a browser all works well but when running via android studio or packaged and pushed into the mobile phone I get a 403.

This is on this line on the index.html: <script src="https://accounts.google.com/gsi/client" async defer></script>

I am trying to integrate/implement "Sign In With Google" button as per this page: https://developers.google.com/identity/gsi/web/guides/client-library

Any pointers?

Thanks in advance!