When I run my swift 3.2 code with Xcode 9 beta 4 this is the error I get:
*** Terminating app due to uncaught exception \'com.firebase.core\', reason: \'[FIRAp
It is possible that your configuration is not done properly
For Flutter
Installing your Firebase configuration file
You must add the file to the project using Xcode (adding manually via the filesystem won't link the file to the project). Using Xcode, open the project's ios/{projectName}.xcworkspace file. Right-click Runner from the left-hand side project navigation within Xcode and select "Add files", as seen below:
Select the GoogleService-Info.plist file you downloaded, and ensure the "Copy items if needed" checkbox is enabled: