When you try to upload your .zip or .pem key files to Google Play Store, you receive the error message "Use a valid app signing key, an unexpected error has occurred".
Most common reasons of the issue are listed below:
- Uploading an incorrect certificate file
- Accepting Google's certificate file mistakenly instead of your custom certificate file
Please follow below steps to resolve the issue:
- Discard the Current Release using the highlighted link below:
- Perform the steps mentioned in Google Play Store Requires New AAB Format For BiznessApps App Submissions article.