Minimum SDK... Play Store doesn't like my .aab

[Anke]

Use a valid app signing key to continue

Completely unnecessary, complicated, time-consuming, ... It only takes a few seconds to successfully upload a new app (as AAB) to the Play Store. As I have already explained several times in various posts and guides, you only need a new keystore (if the old one has already been used for other Play Store apps). Export and backup the current keystore. Delete the current keystore in the Designer (AI2). Reload the browser (not quite sure if necessary). Build the AAB (a new keystore is generated t…

[YoussefM]

Your solution worked.
Thank You.