Undefined symbols for architecture x86_64: "_OBJC_CLASS_$_APIManager", referenced from: objc-class-ref in AppDelegate.o "_OBJC_CLASS_$_UZAppUtils", referenced from: objc-class-ref in ViewController.o "_OBJC_CLASS_$_APIConfiguration", referenced from: objc-class-ref in AppDelegate.o "_OBJC_CLASS_$_APIEventCenter", referenced from: objc-class-ref in ViewController.o "_OBJC_CLASS_$_APIWindowContainer", referenced from: objc-class-ref in ViewController.o ld: symbol(s) not found for architecture x86_64 clang: error: linker command failed with exit code 1 (use -v to see invocation)
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