I've had a similar issue with this error. In my case, I was entering the incorrect password for the Keystore.
I changed the password for the Keystore to match what I was entering (I didn't want to change the password I was entering), but it still gave the same error.
keytool -storepasswd -keystore keystore.jks
Problem was that I also needed to change the Key's password within the Keystore.
When I initially created the Keystore, the Key was created with the same password as the Keystore (I accepted this default option). So I had to also change the Key's password as follows:
keytool -keypasswd -alias my.alias -keystore keystore.jks