Swift: TextFields always show layout-constraint error [duplicate]

Question

I'm creating an iPad-App with an UIView that has two UITextFields in it.
Whenever I run my App and I click in one of the UITextFields and then on the other one (order doesn't matter) it always throws an error, that it has to break a constraint.
I even put two completely new UITextFields on the UIView without any constraints at all and it still shows me that error.

[LayoutConstraints] Unable to simultaneously satisfy constraints.
(
    "<NSLayoutConstraint:0x600003db4c80 'assistantHeight' TUISystemInputAssistantView:0x7fdc1f423400.height == 55   (active)>",
    "<NSLayoutConstraint:0x600003dae940 'assistantView.bottom' TUISystemInputAssistantView:0x7fdc1f423400.bottom == _UIKBCompatInputView:0x7fdc1f21bb20.top   (active)>",
    "<NSLayoutConstraint:0x600003dae8f0 'assistantView.top' V:|-(0)-[TUISystemInputAssistantView:0x7fdc1f423400]   (active, names: '|':UIInputSetHostView:0x7fdc1f432480 )>",
    "<NSLayoutConstraint:0x600003da4d70 'inputView.top' V:|-(0)-[_UIKBCompatInputView:0x7fdc1f21bb20]   (active, names: '|':UIInputSetHostView:0x7fdc1f432480 )>"
)

Will attempt to recover by breaking constraint 
<NSLayoutConstraint:0x600003dae940 'assistantView.bottom' TUISystemInputAssistantView:0x7fdc1f423400.bottom == _UIKBCompatInputView:0x7fdc1f21bb20.top   (active)>

I even tried the symbolic-breakpoint-thing where you get a more detailed report, but I can't find any clues what is wrong here:

UIWindow:0x7fa39f3092a0
|   UITransitionView:0x7fa39f20f360
|   |   UIDropShadowView:0x7fa39f20fa40
|   |   |   UIView:0x7fa39f20f880
|   |   |   |   •UIView:0x7fa39f20b690
|   |   |   |   |   *<UILayoutGuide: 0x6000010e47e0 - "UIViewSafeAreaLayoutGuide", layoutFrame = {{0, 24}, {834, 1088}}, owningView = <UIView: 0x7fa39f20b690; frame = (0 0; 834 1112); autoresize = W+H; layer = <CALayer: 0x600002914fa0>>>
|   |   |   |   |   *UILabel:0x7fa39f20c590'Patient:'
|   |   |   |   |   *UITextField:0x7fa3a1025c00
|   |   |   |   |   |   _UITextFieldRoundedRectBackgroundViewNeue:0x7fa39f20ba90
|   |   |   |   |   |   *_UIBaselineLayoutStrut:0x7fa3a190a320
|   |   |   |   |   |   _UITextFieldCanvasView:0x7fa39f20b340
|   |   |   |   |   *UITextField:0x7fa39f83be00
|   |   |   |   |   |   _UITextFieldRoundedRectBackgroundViewNeue:0x7fa39f20b140
|   |   |   |   |   |   *_UIBaselineLayoutStrut:0x7fa3a1909cb0
|   |   |   |   |   |   UIFieldEditor:0x7fa3a2815000
|   |   |   |   |   |   |   _UITextFieldCanvasView:0x7fa39f20c1f0
|   |   |   |   |   |   |   |   UITextSelectionView:0x7fa39e40a100
|   |   |   |   |   *UIButton:0x7fa39f708b60'Start'
|   |   |   |   |   |   UIButtonLabel:0x7fa3a19063d0'Start'
|   |   |   |   |   *UILabel:0x7fa39f20d200'Sitzung:'
|   |   |   |   |   *UILabel:0x7fa39f709de0'Felder dürfen nicht leer ...'
|   |   |   |   |   *UIButton:0x7fa39f20d480'Daten'
|   |   |   |   |   |   UIButtonLabel:0x7fa3a1909300'Daten'

Is there anything that I'm missing, or a way to fix that error?
I have the same problem with other TextFields in my project and I tried everything from putting the TextFields into a new View or adding/removing constraints.

Answer 1

The problem is that you have assign also an height constraint, so you can remove o the height constraint or the bottom constraint. Otherwise there is another solution, you can set the height constraint not as "equal" but as "greater than", to be sure that the textfield will never be overlap the view below

Answer 2

The layout constraint error message has nothing to do with your layout.

It's an internal issue (could be considered a bug) with the Input Assistant View - the auto-complete options shown above the keyboard.