Download your Firebase configuration files, GoogleService-Info.plist for iOS and google-services.json for android, and place them in the root folder of your cordova project. Check out this firebase article for details on how to download the files.
. This plugin uses a hook (after prepare) that copies the configuration files to the right place,
namely platforms/ios//Resources for ios and platforms/android for android.
Firebase SDK requires the configuration files to be present and valid, otherwise your app will crash on boot or
Firebase features won't work.
Don't forget : If has problem , please reinstall platform using. Run to install