Undefined symbols for architecture armv7 error, ld: symbol(s) not found for architecture armv7 error,

Here's the error code:

Undefined symbols for architecture armv7:

"_OBJC_CLASS_$_FYBSDKOptions", referenced from:

objc-class-ref in AppDelegate.o

"_OBJC_CLASS_$_FyberSDK", referenced from:

objc-class-ref in GameViewController.o

objc-class-ref in MenuViewController.o

objc-class-ref in AppDelegate.o

objc-class-ref in TipsViewController.o

objc-class-ref in CoinsViewController.o

ld: symbol(s) not found for architecture armv7

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

FyberSDK seems outdated. Contact the author for an Xcode 9.x compatible version?

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