Android

Please, export your project to the Android Studio project:

Copy the google-services.json file to the Assets/Platform101XP/AndroidConfig directory, that file should be provided by your release manager.

Unity 2019

To build Android in Unity 2019 you need to upgrade your Gradle version to 6.1.1 or above.

For that:

1. Download Gradle https://services.gradle.org/distributions/gradle-6.1.1-bin.zip

2. Unpack the downloaded archive

3. Go to Preferences > External Tools > Android and set the path to Gradle files in Unity settings: