I had the same problem. The problem is because of renaming the file. You might have downloaded number of google-services.json file in you downloads folder. So when you download a new file it will download with same name but by adding numeric values in brackets. something like google-services(1).json .So you will delete this (1) and copy the file. Make sure when you are renaming it there should not be any spaces or extra . in the name of the file.