I got a _NSKVONotifyingOriginalClassForIsa error and dont know how to solve it :(

Hi! I got this error in crashlitics multiple times and i made several changes in my code to solve it but still appearing. It knwo that is related with AVPlayer. I have an onboarding screen with 4 steps and every step got a different video but I use de same video player (AVPlayer). This video player have 2 observers that are added when the videoURL is setted on the instance of videoplayer and also is removed before added a new observer. I check and all the added observers is removed, but I still getting this error. Can someone help me with this ? Thanks!!

Crashed: com.apple.main-thread
0  libobjc.A.dylib 0x618c class_getMethodImplementation + 32
1  Foundation 0x3dfd0 _NSKVONotifyingOriginalClassForIsa + 28
2  Foundation 0x3fa68 _NSKeyValueObservationInfoGetObservances + 284
3  Foundation 0x18364 NSKeyValueWillChangeWithPerThreadPendingNotifications + 236
4  AVFoundation 0x1a68 (Falta UUID XXXXXX)
5  AVFCore 0x5c55c __67-[AVPlayer _createAndConfigureFigPlayerWithType:completionHandler:]_block_invoke_2 + 172
6  libdispatch.dylib 0x63094 _dispatch_call_block_and_release + 24
7  libdispatch.dylib 0x64094 _dispatch_client_callout + 16
8  libdispatch.dylib 0x10d44 _dispatch_main_queue_drain + 928
9  libdispatch.dylib 0x10994 _dispatch_main_queue_callback_4CF$VARIANT$mp + 36
10 CoreFoundation 0x4e034 __CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ + 12
11 CoreFoundation 0xb538 __CFRunLoopRun + 2544
12 CoreFoundation 0x1e194 CFRunLoopRunSpecific + 572
13 GraphicsServices 0x1988 GSEventRunModal + 160
14 UIKitCore 0x4e5a88 -[UIApplication _run] + 1080
15 UIKitCore 0x27efc8 UIApplicationMain + 336
16 Storybeat 0x6ee0 main + 20 (AppDelegate.swift:20)
17 ??? 0x101df84d0 (Falta)
Con fallos: com.apple.main-thread EXC_BAD_ACCESS KERN_INVALID_ADDRESS 0x000000001036a510

0 libobjc.A.dylib class_getMethodImplementation + 32
1 Foundation _NSKVONotifyingOriginalClassForIsa + 28
2 Foundation _NSKeyValueObservationInfoGetObservances + 284
3 Foundation NSKeyValueWillChangeWithPerThreadPendingNotifications + 236
4 AVFoundation (Falta UUID XXXXX)
5 AVFCore __67-[AVPlayer _createAndConfigureFigPlayerWithType:completionHandler:]_block_invoke_2 + 172
6 libdispatch.dylib _dispatch_call_block_and_release + 24
7 libdispatch.dylib _dispatch_client_callout + 16
8 libdispatch.dylib _dispatch_main_queue_drain + 928
9 libdispatch.dylib _dispatch_main_queue_callback_4CF$VARIANT$mp + 36
10 CoreFoundation __CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ + 12
11 CoreFoundation __CFRunLoopRun + 2544
12 CoreFoundation CFRunLoopRunSpecific + 572
13 GraphicsServices GSEventRunModal + 160
14 UIKitCore -[UIApplication _run] + 1080
15 UIKitCore UIApplicationMain + 336
16 Storybeat AppDelegate.swift - Línea 20 main + 20
17 (Falta)

Also I getting a related (I think) error

Crashed: com.apple.main-thread 0 libobjc.A.dylib 0x7e74 object_isClass + 16 1 Foundation 0x1cf88 KVO_IS_RETAINING_ALL_OBSERVERS_OF_THIS_OBJECT_IF_IT_CRASHES_AN_OBSERVER_WAS_OVERRELEASED_OR_SMASHED + 44 2 Foundation 0x18384 NSKeyValueWillChangeWithPerThreadPendingNotifications + 268 3 AVFCore 0x5c55c __67-[AVPlayer _createAndConfigureFigPlayerWithType:completionHandler:]_block_invoke_2 + 172 4 libdispatch.dylib _dispatch_call_block_and_release + 24

I getting the same crash, how to resolve it?

I got a _NSKVONotifyingOriginalClassForIsa error and dont know how to solve it :(
 
 
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