I was implementing push notification in react native for ios for that i was following react native firebase document
After adding GoogleService-info.plist I was getting this error:
could not find a valid GoogleService-Info.plist in your project
When I check the Target Membership of GoogleService-Info.plist the project checking was disabled as shown in the below image
Here is, how I added file to the project:
1: Right click on project folder and selected option for add file to {project name}
after that I tried adding folder in both group and folder reference. But it showed same error 
