Cordova error after installing phonegap-plugin-push

Hi all, I am doing push notification (I followed this tutorial: https://devdactic.com/ionic-push-notifications-guide/). But after I install ionic-platform-web-client and phonegap-plugin-push plugins, app throw cordova error. ( cannot go to $rootScope.$on(‘onResumeCordova’) function.
Who met it? Help me!