Issue installing react-native-firebase on iOS

I'm attempting to install react-native-firebase on an iOS project. I've followed all instructions but keep having issue

I get the following error:

However, I'm able to import <Firebase.h> from the AppDelegate.m file

I've tried different way to troubleshoot:

• pod update
• Uncommented platform :ios, '9.0'
• Cleaned project
• Reinstalled everything
• Added Header Search Paths in Build Settings with: $(SRCROOT)/../node_modules/react-native-firebase/ios/RNFirebase in recursive

... I'm not sure what is left to try!

This is the dependencies downloaded by Pod:

Using Firebase (5.1.0)
Using FirebaseAnalytics (5.0.1)
Using FirebaseCore (5.0.2)
Using FirebaseInstanceID (3.0.0)
Using GoogleToolboxForMac (2.1.4)

Any idea what else could cause this problem?

Thanks