crash

[gordanyang]

  Trapped uncaught exception 'NSGenericException', reason: 'Unable to install constraint on view.  Does the constraint reference something from outside the subtree of the view?  That's illegal. constraint:<NSLayoutConstraint:0x1c029d650 UIView:0x1076ebcc0.width == 414> view:<UITransitionView: 0x112c66cf0; frame = (0 0; 414 736); autoresize = W+H; layer = <CALayer: 0x1c04380c0>>' 
(
	0   CoreFoundation                      0x000000018376e37c <redacted> + 148
	1   libobjc.A.dylib                     0x00000001829b4528 objc_exception_throw + 56
	2   CoreFoundation                      0x000000018376e2ac <redacted> + 0
	3   Foundation                          0x00000001840ab9a0 <redacted> + 236
	4   UIKit                               0x000000018cd3725c <redacted> + 488
	5   UIKit                               0x000000018cd37038 <redacted> + 36
	6   UIKit                               0x000000018cd40134 <redacted> + 176
	7   Foundation                          0x00000001840ab4dc <redacted> + 168
	8   UIKit                               0x000000018cd3fffc <redacted> + 164
	9   *******                             0x0000000104f88b98 -[SPAlertPresentationController updateConstraints] + 7648
	10  *******                             0x0000000104f86708 -[SPAlertPresentationController containerViewWillLayoutSubviews] + 200
	11  UIKit                               0x000000018cc4ce38 <redacted> + 1076
	12  QuartzCore                          0x00000001877b1998 <redacted> + 184
	13  QuartzCore                          0x00000001877b5b20 <redacted> + 332
	14  QuartzCore                          0x000000018772236c <redacted> + 336
	15  QuartzCore                          0x0000000187749b90 <redacted> + 540
	16  UIKit                               0x000000018cc425c8 <redacted> + 256
	17  CoreFoundation                      0x0000000183715edc <redacted> + 32
	18  CoreFoundation                      0x0000000183713894 <redacted> + 412
	19  CoreFoundation                      0x0000000183713e50 <redacted> + 1292
	20  CoreFoundation                      0x0000000183633e58 CFRunLoopRunSpecific + 436
	21  GraphicsServices                    0x00000001854e0f84 GSEventRunModal + 100
	22  UIKit                               0x000000018ccb367c UIApplicationMain + 236
	23  *******                             0x0000000104c0f658 main + 184
	24  libdyld.dylib                       0x000000018315056c <redacted> + 4
)