Crash log

Fatal Exception: NSInvalidArgumentException
0  CoreFoundation                 0x187e1259c __exceptionPreprocess
1  libobjc.A.dylib                0x198a6c0e4 objc_exception_throw
2  CoreFoundation                 0x187e124dc -[NSException initWithCoder:]
3  UIKit                          0x18c5c7d50 -[UIView(Internal) _addSubview:positioned:relativeTo:]
4  UIKit                          0x18c7ab4b0 __53-[_UINavigationParallaxTransition animateTransition:]_block_invoke
5  UIKit                          0x18c5cece8 +[UIView(Animation) performWithoutAnimation:]
6  UIKit                          0x18c7aad3c -[_UINavigationParallaxTransition animateTransition:]
7  UIKit                          0x18c764704 -[UINavigationController _startCustomTransition:]
8  UIKit                          0x18c675630 -[UINavigationController _startDeferredTransitionIfNeeded:]
9  UIKit                          0x18c6753fc -[UINavigationController __viewWillLayoutSubviews]
10 UIKit                          0x18c67537c -[UILayoutContainerView layoutSubviews]
11 UIKit                          0x18c5bdd2c -[UIView(CALayerDelegate) layoutSublayersOfLayer:]
12 QuartzCore                     0x18bf15994 -[CALayer layoutSublayers]
13 QuartzCore                     0x18bf10564 CA::Layer::layout_if_needed(CA::Transaction*)
14 QuartzCore                     0x18bf10408 CA::Layer::layout_and_display_if_needed(CA::Transaction*)
15 QuartzCore                     0x18bf0fc08 CA::Context::commit_transaction(CA::Transaction*)
16 QuartzCore                     0x18bf0f98c CA::Transaction::commit()
17 UIKit                          0x18c5bfc48 _UIApplicationHandleEventQueue
18 CoreFoundation                 0x187dca9ec __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__
19 CoreFoundation                 0x187dc9c90 __CFRunLoopDoSources0
20 CoreFoundation                 0x187dc7d40 __CFRunLoopRun
21 CoreFoundation                 0x187cf50a4 CFRunLoopRunSpecific
22 GraphicsServices               0x190e7b5a4 GSEventRunModal
23 UIKit                          0x18c626aa4 UIApplicationMain
24 uShip                          0x1000c3ce0 main (main.m:44)
25 libdyld.dylib                  0x1990daa08 start