Developer certificate and private key not found in keystore or store password not supplied
You attempted to sign an application using the blackberry-signer tool, but you did not provide a value for the storepass option, or your Developer Certificate has no private key named author.
Verify that your command line includes the storepass option, and specifies the correct password.
Recreate your Developer Certificate. You can use the blackberry-keytool tool. Make sure that you provide the literal value "author" (not your name) for the alias option.