Creating context
2017-02-26 22:20:27.178583 PutInOne[12090:297221] [LayoutConstraints] Unable to simultaneously satisfy constraints.
	Probably at least one of the constraints in the following list is one you don't want.
	Try this:
		(1) look at each constraint and try to figure out which you don't expect;
		(2) find the code that added the unwanted constraint or constraints and fix it.
(
    "<NSLayoutConstraint:0x600000282030 H:[UIButton:0x7fc3dff08660'Play']-(20)-|   (active, names: '|':UIStackView:0x7fc3dfe01260 )>",
    "<NSLayoutConstraint:0x608000282030 'UISV-canvas-connection' UILayoutGuide:0x60800019b6c0'UIViewLayoutMarginsGuide'.trailing == UIButton:0x7fc3dff08660'Play'.trailing   (active)>",
    "<NSLayoutConstraint:0x608000281680 'UIView-rightMargin-guide-constraint' H:[UILayoutGuide:0x60800019b6c0'UIViewLayoutMarginsGuide']-(8)-|(LTR)   (active, names: '|':UIStackView:0x7fc3dfe01260 )>"
)

Will attempt to recover by breaking constraint
<NSLayoutConstraint:0x608000282030 'UISV-canvas-connection' UILayoutGuide:0x60800019b6c0'UIViewLayoutMarginsGuide'.trailing == UIButton:0x7fc3dff08660'Play'.trailing   (active)>

Make a symbolic breakpoint at UIViewAlertForUnsatisfiableConstraints to catch this in the debugger.
The methods in the UIConstraintBasedLayoutDebugging category on UIView listed in <UIKit/UIView.h> may also be helpful.
2017-02-26 22:20:27.179508 PutInOne[12090:297221] [LayoutConstraints] Unable to simultaneously satisfy constraints.
	Probably at least one of the constraints in the following list is one you don't want.
	Try this:
		(1) look at each constraint and try to figure out which you don't expect;
		(2) find the code that added the unwanted constraint or constraints and fix it.
(
    "<NSLayoutConstraint:0x600000282120 H:|-(20)-[UIButton:0x7fc3dff08660'Play']   (active, names: '|':UIStackView:0x7fc3dfe01260 )>",
    "<NSLayoutConstraint:0x608000281f40 'UISV-canvas-connection' UILayoutGuide:0x60800019b6c0'UIViewLayoutMarginsGuide'.leading == UIButton:0x7fc3dff08660'Play'.leading   (active)>",
    "<NSLayoutConstraint:0x6080002814f0 'UIView-leftMargin-guide-constraint' H:|-(8)-[UILayoutGuide:0x60800019b6c0'UIViewLayoutMarginsGuide'](LTR)   (active, names: '|':UIStackView:0x7fc3dfe01260 )>"
)

Will attempt to recover by breaking constraint
<NSLayoutConstraint:0x608000281f40 'UISV-canvas-connection' UILayoutGuide:0x60800019b6c0'UIViewLayoutMarginsGuide'.leading == UIButton:0x7fc3dff08660'Play'.leading   (active)>

Make a symbolic breakpoint at UIViewAlertForUnsatisfiableConstraints to catch this in the debugger.
The methods in the UIConstraintBasedLayoutDebugging category on UIView listed in <UIKit/UIView.h> may also be helpful.