Unity 2017.3.1p1 + IOS + XCODE 9.2 + FireBase error on build

Hello, I've been trying to integrate FireBase Messaging into our Unity IOS app and the error below cropped up when building my branch to device.

Undefined symbols for architecture arm64:

  "_endSettingsDialog", referenced from:

      -[DismissDialogViewController viewDidAppear:] in libvrunity.a(unity.o)

ld: symbol(s) not found for architecture arm64

clang: error: linker command failed with exit code 1 (use -v to see invocation)

From looking at other "linker command failed with exit code 1 (use -v to see invocation)" posts, I gathered there's a class or method named "DismissDialogViewController" that I should comment out for IOS build. However, the libvrunity.a IOS plugin is designed for IOS....

I've tried to build as described here.

I don't get how this vr library conflicts with Firebase so any leads would be fantastic. Thanks in advance!

 

Might be this https://firebase.google.com/docs/unity/setup#installing_plugins_in_unity_2017x_net_4x_projects

 

Thanks for the response! I cleaned up our resolvers and removed libvrunity (Cardboard SDK files as it turns out, which we don't need) and was able to build.

PS our project is not yet .NET 4.x enabled.