(lldb) bt
* thread #1, queue = 'com.apple.main-thread', stop reason = Fatal error: MedialibraryService: no mrl
    frame #0: 0x00000001c45b9194 libswiftCore.dylib`_swift_runtime_on_report
    frame #1: 0x00000001c460f738 libswiftCore.dylib`_swift_stdlib_reportFatalErrorInFile + 188
    frame #2: 0x00000001c4358d20 libswiftCore.dylib`function signature specialization <Arg[1] = [Closure Propagated : closure #1 (Swift.UnsafeBufferPointer<Swift.UInt8>) -> () in closure #1 (Swift.UnsafeBufferPointer<Swift.UInt8>) -> () in Swift._assertionFailure(_: Swift.StaticString, _: Swift.String, file: Swift.StaticString, line: Swift.UInt, flags: Swift.UInt32) -> Swift.Never, Argument Types : [Swift.StaticStringSwift.UnsafeBufferPointer<Swift.UInt8>Swift.UIntSwift.UInt32]> of generic specialization <()> of Swift.String._withUnsafeBufferPointerToUTF8<A>((Swift.UnsafeBufferPointer<Swift.UInt8>) throws -> A) throws -> A + 408
    frame #3: 0x00000001c4534b98 libswiftCore.dylib`function signature specialization <Arg[0] = Exploded, Arg[1] = Exploded> of Swift._assertionFailure(_: Swift.StaticString, _: Swift.String, file: Swift.StaticString, line: Swift.UInt, flags: Swift.UInt32) -> Swift.Never + 352
    frame #4: 0x00000001c4358360 libswiftCore.dylib`Swift.assertionFailure(_: @autoclosure () -> Swift.String, file: Swift.StaticString, line: Swift.UInt) -> () + 96
    frame #5: 0x00000001029fbd64 VLC for iOS`MediaLibraryService.fetchMedia(mrl=nil, self=0x00000002803de940) at MediaLibraryService.swift:299:13
    frame #6: 0x00000001029fc06c VLC for iOS`@objc MediaLibraryService.fetchMedia(with:) at <compiler-generated>:0
  * frame #7: 0x00000001029fc508 VLC for iOS`MediaLibraryService.savePlaybackState(player=0x00000002838952c0, self=0x00000002803de940) at MediaLibraryService.swift:313:29
    frame #8: 0x00000001029fc8d0 VLC for iOS`@objc MediaLibraryService.savePlaybackState(from:) at <compiler-generated>:0
    frame #9: 0x0000000102904d94 VLC for iOS`-[VLCMovieViewController savePlaybackState:](self=0x0000000136195000, _cmd="savePlaybackState:", controller=0x00000002838952c0) at VLCMovieViewController.m:1101:5
    frame #10: 0x00000001028f6898 VLC for iOS`-[VLCPlaybackController applicationWillResignActive:](self=0x00000002838952c0, _cmd="applicationWillResignActive:", aNotification=@"UIApplicationWillResignActiveNotification") at VLCPlaybackController.m:1167:5
    frame #11: 0x00000001968515bc CoreFoundation`__CFNOTIFICATIONCENTER_IS_CALLING_OUT_TO_AN_OBSERVER__ + 20
    frame #12: 0x0000000196851588 CoreFoundation`___CFXRegistrationPost_block_invoke + 64
    frame #13: 0x0000000196850a7c CoreFoundation`_CFXRegistrationPost + 392
    frame #14: 0x0000000196850728 CoreFoundation`___CFXNotificationPost_block_invoke + 96
    frame #15: 0x00000001967ca524 CoreFoundation`-[_CFXNotificationRegistrar find:object:observer:enumerator:] + 1496
    frame #16: 0x00000001968501d8 CoreFoundation`_CFXNotificationPost + 696
    frame #17: 0x0000000197238814 Foundation`-[NSNotificationCenter postNotificationName:object:userInfo:] + 68
    frame #18: 0x00000001c2e19848 UIKitCore`-[UIApplication _deactivateForReason:notify:] + 932
    frame #19: 0x00000001c26e9574 UIKitCore`__125-[_UICanvasLifecycleSettingsDiffAction performActionsForCanvas:withUpdatedScene:settingsDiff:fromSettings:transitionContext:]_block_invoke + 1156
    frame #20: 0x00000001c26e9fb0 UIKitCore`_performActionsWithDelayForTransitionContext + 112
    frame #21: 0x00000001c26e9084 UIKitCore`-[_UICanvasLifecycleSettingsDiffAction performActionsForCanvas:withUpdatedScene:settingsDiff:fromSettings:transitionContext:] + 244
    frame #22: 0x00000001c26edd84 UIKitCore`-[_UICanvas scene:didUpdateWithDiff:transitionContext:completion:] + 360
    frame #23: 0x00000001c2a1d3b8 UIKitCore`-[UIApplicationSceneClientAgent scene:handleEvent:withCompletion:] + 464
    frame #24: 0x000000019925b920 FrontBoardServices`__80-[FBSSceneImpl updater:didUpdateSettings:withDiff:transitionContext:completion:]_block_invoke_3 + 224
    frame #25: 0x0000000107434c74 libdispatch.dylib`_dispatch_client_callout + 16
    frame #26: 0x0000000107438840 libdispatch.dylib`_dispatch_block_invoke_direct + 232
    frame #27: 0x00000001992950bc FrontBoardServices`__FBSSERIALQUEUE_IS_CALLING_OUT_TO_A_BLOCK__ + 40
    frame #28: 0x0000000199294d58 FrontBoardServices`-[FBSSerialQueue _performNext] + 408
    frame #29: 0x0000000199295310 FrontBoardServices`-[FBSSerialQueue _performNextFromRunLoopSource] + 52
    frame #30: 0x00000001968722bc CoreFoundation`__CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 24
    frame #31: 0x000000019687223c CoreFoundation`__CFRunLoopDoSource0 + 88
    frame #32: 0x0000000196871b24 CoreFoundation`__CFRunLoopDoSources0 + 176
    frame #33: 0x000000019686ca60 CoreFoundation`__CFRunLoopRun + 1004
    frame #34: 0x000000019686c354 CoreFoundation`CFRunLoopRunSpecific + 436
    frame #35: 0x0000000198a6c79c GraphicsServices`GSEventRunModal + 104
    frame #36: 0x00000001c2e23b68 UIKitCore`UIApplicationMain + 212
    frame #37: 0x0000000102942aec VLC for iOS`main(argc=1, argv=0x000000016d5377e0) at main.m:20:16
    frame #38: 0x00000001963328e0 libdyld.dylib`start + 4
(lldb)