Crash on launch

[borisyurkevich]

iOS 10.2, Xcode 8.2.1 (8C1002).

2017-02-07 17:53:32.579 SoundCloudWaveViewDemo[95366:7236991] *** Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[<NSLayoutConstraint 0x60000008bfe0> setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key firstItem.'
*** First throw call stack:
(
	0   CoreFoundation                      0x000000010b46fd4b __exceptionPreprocess + 171
	1   libobjc.A.dylib                     0x000000010ab6821e objc_exception_throw + 48
	2   CoreFoundation                      0x000000010b46fc99 -[NSException raise] + 9
	3   Foundation                          0x000000010a6769df -[NSObject(NSKeyValueCoding) setValue:forKey:] + 291
	4   SoundCloudWaveViewDemo              0x000000010a5756ce +[XXNibBridgeImplementation instantiateRealViewFromPlaceholder:] + 1438
	5   SoundCloudWaveViewDemo              0x000000010a5750d4 -[XXNibBridgeImplementation hackedAwakeAfterUsingCoder:] + 244
	6   UIKit                               0x000000010ddf0219 UINibDecoderDecodeObjectForValue + 804
	7   UIKit                               0x000000010ddefeee -[UINibDecoder decodeObjectForKey:] + 98
	8   UIKit                               0x000000010dbfbd14 -[UIRuntimeConnection initWithCoder:] + 178
	9   UIKit                               0x000000010ddf01a1 UINibDecoderDecodeObjectForValue + 684
	10  UIKit                               0x000000010ddf0357 UINibDecoderDecodeObjectForValue + 1122
	11  UIKit                               0x000000010ddefeee -[UINibDecoder decodeObjectForKey:] + 98
	12  UIKit                               0x000000010dbfaeb8 -[UINib instantiateWithOwner:options:] + 1249
	13  UIKit                               0x000000010d98e9c5 -[UIViewController _loadViewFromNibNamed:bundle:] + 386
	14  UIKit                               0x000000010d98f2e7 -[UIViewController loadView] + 177
	15  UIKit                               0x000000010d98f61c -[UIViewController loadViewIfRequired] + 201
	16  UIKit                               0x000000010d98fe70 -[UIViewController view] + 27
	17  UIKit                               0x000000010d8594b5 -[UIWindow addRootViewControllerViewIfPossible] + 71
	18  UIKit                               0x000000010d859c06 -[UIWindow _setHidden:forced:] + 293
	19  UIKit                               0x000000011bddd60a -[UIWindowAccessibility _orderFrontWithoutMakingKey] + 89
	20  UIKit                               0x000000010d86d519 -[UIWindow makeKeyAndVisible] + 42
	21  UIKit                               0x000000010d7e5f8d -[UIApplication _callInitializationDelegatesForMainScene:transitionContext:] + 4818
	22  UIKit                               0x000000010d7ec0ed -[UIApplication _runWithMainScene:transitionContext:completion:] + 1731
	23  UIKit                               0x000000010d7e926d -[UIApplication workspaceDidEndTransaction:] + 188
	24  FrontBoardServices                  0x0000000110d576cb __FBSSERIALQUEUE_IS_CALLING_OUT_TO_A_BLOCK__ + 24
	25  FrontBoardServices                  0x0000000110d57544 -[FBSSerialQueue _performNext] + 189
	26  FrontBoardServices                  0x0000000110d578cd -[FBSSerialQueue _performNextFromRunLoopSource] + 45
	27  CoreFoundation                      0x000000010b414761 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17
	28  CoreFoundation                      0x000000010b3f998c __CFRunLoopDoSources0 + 556
	29  CoreFoundation                      0x000000010b3f8e76 __CFRunLoopRun + 918
	30  CoreFoundation                      0x000000010b3f8884 CFRunLoopRunSpecific + 420
	31  UIKit                               0x000000010d7e7aea -[UIApplication _run] + 434
	32  UIKit                               0x000000010d7edc68 UIApplicationMain + 159
	33  SoundCloudWaveViewDemo              0x000000010a5802df main + 111
	34  libdyld.dylib                       0x000000010d4c768d start + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException

[emc2ws]

update XXNibBridge to latest version https://github.com/sunnyxx/XXNibBridge