When playing a video in WKWebView I get this exception thrown after playing a video in "Full window mode" (that is when video takes over the size of the window, not to be confused with "full screen mode").
I'm running on Mac Catalyst.
#1 0x0000000188855800 in -[NSException raise] ()
#2 0x0000000189c2170c in -[NSObject(NSKeyValueCoding) valueForUndefinedKey:] ()
#3 0x000000018968db9c in -[NSObject(NSKeyValueCoding) valueForKey:] ()
#4 0x000000018968da04 in -[NSObject(NSKeyValueCoding) valueForKeyPath:] ()
#5 0x00000001b9709a10 in -[AVPlaybackControlsController _observeBoolForKeyPath:usingKeyValueObservationController:observationHandler:] ()
#6 0x00000001b97066a8 in -[AVPlaybackControlsController _startObservingForPlaybackViewUpdates] ()
#7 0x00000001b9708ad4 in -[AVPlaybackControlsController _updatePlaybackControlsVisibleAndObservingUpdates] ()
#8 0x00000001b96db568 in __81-[AVPlayerViewController transitionController:willBeginPresentingViewController:]_block_invoke ()
#9 0x00000001b290f3ec in -[_UIViewControllerTransitionCoordinator _applyBlocks:releaseBlocks:] ()
#10 0x00000001b28e01cc in -[_UIViewControllerTransitionContext _runAlongsideCompletions] ()
#11 0x00000001b28df984 in -[_UIViewControllerTransitionContext completeTransition:] ()
#12 0x00000001b972300c in __35-[AVTransition completeTransition:]_block_invoke ()
#13 0x00000001b96da368 in -[AVPlayerViewController transitionController:transitionWillComplete:continueBlock:] ()
#14 0x00000001b9736448 in -[AVTransitionController transitionWillComplete:success:continueBlock:] ()
#15 0x00000001b9722e44 in -[AVTransition completeTransition:] ()
#16 0x00000001b2b08a04 in -[UIViewPropertyAnimator _executeCompletionHandlerWithFinalPosition:] ()
#17 0x00000001b2b08ac4 in -[UIViewPropertyAnimator _runCompletions:finished:] ()
#18 0x00000001b2b07b10 in __61-[UIViewPropertyAnimator _setupAssociatedViewAnimationState:]_block_invoke ()
#19 0x00000001b375214c in UIVIEW_IS_EXECUTING_ANIMATION_COMPLETION_BLOCK ()
#20 0x00000001b28e2258 in -[UIViewAnimationBlockDelegate _didEndBlockAnimation:finished:context:] ()
#21 0x00000001b28e1d8c in -[UIViewAnimationState sendDelegateAnimationDidStop:finished:] ()
#22 0x00000001b297c330 in -[UIViewAnimationState animationDidStop:finished:] ()
#23 0x0000000213b66110 in -[UIViewAnimationStateAccessibility animationDidStop:finished:] ()
#24 0x000000018fe7e288 in CA::Layer::run_animation_callbacks(void*) ()
And the exception is: "[<WebAVPlayerController valueForUndefinedKey:]: this class is not key value coding-compliant for the key coordinatedPlaybackActive."**