Quickstart-ios: where is apm_UTF32Length?

[rigroch]

I've got an error with crash.

*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[__NSCFConstantString apm_UTF32Length]: unrecognized selector sent to instance 0x103598930'

I have experience for similar situations that "gtm_httpArgumentsString..."... already fixed it with -force_load.

I didn't using Cocoapods, becuase my environment without Internet Connection.
So I did download frameworks "Firebase-6.0.0.zip" from https://firebase.google.com/docs/ios/setup?hl=ko#frameworks

How can I fix it?

[morganchen12]

Have you added the -ObjC linker flag to Other Linker Flags in Xcode?