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2018-09-10 04:28:52.083425+0900 Tutorial[70287:2348418] [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. 
(
    "<SnapKit.LayoutConstraint:[email protected]#66 UIView:0x7fc51547eb90.top == UITableViewCellContentView:0x7fc51547d720.top>",
    "<SnapKit.LayoutConstraint:[email protected]#69 Down.DownView:0x7fc51687ea00.height == 280.5>",
    "<SnapKit.LayoutConstraint:[email protected]#70 Down.DownView:0x7fc51687ea00.top == UIView:0x7fc51547eb90.bottom>",
    "<SnapKit.LayoutConstraint:[email protected]#71 Down.DownView:0x7fc51687ea00.bottom == UITableViewCellContentView:0x7fc51547d720.bottom>",
    "<SnapKit.LayoutConstraint:[email protected]#74 UIImageView:0x7fc51547a300.height == 18.0>",
    "<SnapKit.LayoutConstraint:[email protected]#76 UIImageView:0x7fc51547a300.top == UIView:0x7fc51547eb90.top + 9.0>",
    "<SnapKit.LayoutConstraint:[email protected]#76 UIImageView:0x7fc51547a300.bottom == UIView:0x7fc51547eb90.bottom - 9.0>",
    "<NSLayoutConstraint:0x600000298f60 'UIView-Encapsulated-Layout-Height' UITableViewCellContentView:0x7fc51547d720.height == 334.5   (active)>"
)

Will attempt to recover by breaking constraint 
<SnapKit.LayoutConstraint:[email protected]#74 UIImageView:0x7fc51547a300.height == 18.0>

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.