App Signing publishing error for abb file

[Anke]

@Tonga1

"Tutorial for signing an ABB file", which is quite complex and I'm not being successful doing it from a Mac.

AAB file signing tutorial

For new apps (i.e. for AABs) you just have to make sure that a new keystore is used. That's all.

1. Export the current keystore and backup it.
2. Delete the current keystore in the Designer (AI2).
3. Reload the browser (not quite sure if necessary).
4. Build the AAB (a new keystore is generated then).
5. Upload AAB to the Play Store.