QuestPlayingViewController imageView Constraint Conflict

[israbbani]

In the QuestPlayingViewController, setting the width of the image to 0 is being done by subtracting a constant from it. Autolayout doesn't like this

2016-02-16 14:34:03.920 Carleton150[209:6461] 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:0x196ce200 UIImageView:0x196d8b00.width == 0.65*UIView:0x196ce230.width - 390>",
    "<NSLayoutConstraint:0x196e4d60 H:[UIView:0x196ce230]-(0)-|   (Names: '|':UIView:0x196e4420 )>",
    "<NSLayoutConstraint:0x196e4d90 UIView:0x196ce230.centerX == UIView:0x196e4420.centerX>",
    "<NSLayoutConstraint:0x196edc60 'UIView-Encapsulated-Layout-Width' H:[UIView:0x196e4420(320)]>"
)

Will attempt to recover by breaking constraint 
<NSLayoutConstraint:0x196ce200 UIImageView:0x196d8b00.width == 0.65*UIView:0x196ce230.width - 390>

Make a symbolic breakpoint at UIViewAlertForUnsatisfiableConstraints to catch this in the debugger.