I've just now started using app bundles. I've set the two certificates in the App signing section of the dashboard (signing certificate and upload certificate).
I've built an app bundle and signed it with the upload certificate, but when I upload the bundle under Android Instant Apps (which is in fact the reason I switched to app bundles) it says that:
Your Android App Bundle is signed with the wrong key. Ensure that your app bundle is signed with the correct signing key and try again: xx:xx:xx:xx.....
I've manually checked the SHA-1 of the upload keystore (using keytool in the terminal) and it matches the xx:xx:xx.... it says in the error message.
What am I doing wrong? The app bundle IS signed with the required upload certificate, but google play doesn't seem to like it.
Ideas?