title: Apple Mach-O Linker Error - Undefined symbols for architecture x86_64: "_UISceneWillEnterForegroundNotification" and "___isPlatformVersionAtLeast"
body: <p>I am using <a href="https://github.com/tinycreative/react-native-intercom" rel="noreferrer">https://github.com/tinycreative/react-native-intercom</a> and went through the installation there and <a href="https://developers.intercom.com/installing-intercom/docs/ios-installation" rel="noreferrer">https://developers.intercom.com/installing-intercom/docs/ios-installation</a></p>
  
  <p>This worked fine for a while and just started all of a sudden.</p>
  
  <p><a href="https://i.stack.imgur.com/fcG77.jpg" rel="noreferrer"><img src="https://i.stack.imgur.com/fcG77.jpg" alt="enter image description here"></a></p>
  
  <pre><code>  "_UISceneWillEnterForegroundNotification", referenced from:
        +[ICMBridge load] in Intercom(ICMBridge.o)
    "___isPlatformVersionAtLeast", referenced from:
        -[IntercomSDK_IntercomConversationCollectionViewController insetsForAccessoryView] in Intercom(IntercomConversationCollectionViewController.o)
        +[IntercomSDK_ITBUpload createUploadForMediaAsset:completion:] in Intercom(ITBUpload.o)
        +[IntercomSDK_ITBUpload processImageDataForUpload:mediaAsset:info:imageUploadDataUTI:completion:] in Intercom(ITBUpload.o)
        -[IntercomSDK_IIMInputAccessoryView createConstraints] in Intercom(IIMInputAccessoryView.o)
        -[IntercomSDK_IIMInputButtonContainerView createConstraints] in Intercom(IIMInputButtonContainerView.o)
        -[IntercomSDK_IIMMediaViewController updateCollectionViewContentInsets] in Intercom(IIMMediaViewController.o)
        -[IntercomSDK_IIMMediaViewController layoutExpandButton] in Intercom(IIMMediaViewController.o)
        ...
  ld: symbol(s) not found for architecture x86_64
  clang: error: linker command failed with exit code 1 (use -v to see invocation)
  </code></pre>