Estoy intentando entender de que va exactamente las notificaciones push de backend del portal Monaca.

@carlosflores Hi, the error is caused by <config-file> settings with no target defined in config.xml within the plugin. They are breaking plugins. For more information about this issue, please refer to this thread. In short, you will need to modify the config.xml file of the plugin and make sure that every <config-file> setting has defined a target.

@carlosflores So I’ve just tried to import the plugin myself. You don’t need any configuration regarding this plugin in config.xml file. Then, add cordova-plugin-enable-multidex plugin to your project. This way the build will succeed.