Failure [INSTALL_FAILED_VERSION_DOWNGRADE]
You're trying to install apk with a lower versionCode that is already installed.
Either uninstall an app or increment the versionCode.
[ERROR] An error occurred while running cordova run android (exit code 1).
Did you search your apps to make sure the old one is uninstalled?
I usually get this if I forget to uninstall the app-store version before running a test build