I\'m trying to make sense of how to upload an app onto Google Play while using Google Play App Signing.
Here is what I did:
I think you must have generated your keystore like this from your "java\bin" folder:
keytool -genkey -v -keystore my-release-key.keystore -alias alias_name -keyalg RSA -keysize 2048 -validity 10000
When you want to update yout app you must have to use the same keystore that you have generated.
Go to Build > Generate Signed APK.
Select "Choose existing" and browse to your keystore path
Enter "key store password"
In key alias tap on "..." and check whether your key alias is same as the one you have provided while generating keystore
If yes again provide "Key Password"
Tap on "Next"
Let me know in which step you are getting the problem, so I can guide you accordingly.