I have a project with 1 module and 2 applications. The module is used for code parts that both applications uses. Of course I have separate google-services.json files in the
That Problem is because:-
The folder or file you pasted to your product downloaded from the firebase console is not named as google-services.json.
so now click it then right mouse click in all the options open refractor and rename it to google-services.json. because this worked for me