@rcpinheiro I’ve tested this plugin with Cordova 7.1 and the builds were successful for both iOS and Android. If you have made any configuration related to this plugin in config.xml file, please remove it. That might be the reason why your build failed.

Just a quick reminder to whomever sees this: this tutorial uses DialogFlow V1 that it’s not possible to use in new Google projects and will stop working for everyone on October 23th, 2019. For more information: https://github.com/dialogflow/dialogflow-cordova-client