Impossible to install plugin

Dear, I am trying to implement Push Notifications with Firebase and look at the Native Firebase, however when installing the plugin it does not do anything else, the process is “stuck” without advancing.

nicolas$ ionic cordova plugin add cordova-plugin-firebase
> cordova plugin add cordova-plugin-firebase --save

Mi Ionic Info


   ionic (Ionic CLI)  : 4.1.0 (/usr/local/lib/node_modules/ionic)
   Ionic Framework    : ionic-angular 3.9.2
   @ionic/app-scripts : 3.1.11

   cordova (Cordova CLI) : 8.0.0
   Cordova Platforms     : android 7.0.0

   ios-deploy : 1.9.2
   NodeJS     : v8.10.0 (/usr/local/bin/node)
   npm        : 5.6.0
   OS         : macOS High Sierra
   Xcode      : Xcode 9.4.1 Build version 9F2000