Export Error in Building app

Hi I want to export my app but I encountered an error error code:The compiler error output was ________Preparing application icon ________Creating animation xml ________Creating fragment xml ________Creating listview xml in res/layout/… ________Creating listview xml in res/layout-v21/… ________Creating xml in res/drawable/… ________Creating splash png in res/drawable/… ________Creating colors xml ________Creating styles xml ________Creating drawables xml v21 ________Checking for firebase ________________Firebase components found. ________________Firebase config file error. . Note:I use Firebase Authanticator in my app.Note 2:I export google services asset.

If google-services.json is already in assets then check for missing firabase usl