Youtube_player_flutter: метод deactivate() выдает ошибку

Когда я перемещаюсь по странице, содержащей видеоплеер, на другую страницу, он выдает ошибку в _controller.pause(); линия.

недействительным деактивировать () {
_контроллер.пауза();
супер.деактивировать();
}

Журнал событий ниже:

W/ScreenOrientationListener(17293): Удаление несуществующего наблюдателя!
W/chromium(17293): [ПРЕДУПРЕЖДЕНИЕ:aw_contents.cc(315)] SP>>> Уничтожить
I/chromium(17293): [INFO:synchronous_compositor_impl.cc(111)] [SynchronousCompositorImpl::SetClient] [0x0000007f359b5ec0]
I/MediaCodec(17293): [выпуск]строка:383 [OMX.google.opus.decoder]+++
Кодек I/AC (17293): freeBuffersOnPort portIndex 0
I/ACodec (17293): freeBuffersOnPort portIndex 1
I/MediaCodec(17293): [onMessageReceived]строка:1268 [OMX.google.opus.decoder][what=kWhatShutdownCompleted][state 10][msg='AMessage(what = 'codc', target = 2) = {
I/MediaCodec(17293): int32_t что = 1935896429
I/MediaCodec(17293): }' ]
I/MediaCodec(17293): [~MediaCodec]строка:205 [][mState 0]+++
I/MediaCodec(17293): [выпуск]строка:383 [OMX.MTK.VIDEO.DECODER.VP9]+++
Кодек I/AC (17293): freeBuffersOnPort portIndex 0
I/ACodec (17293): freeBuffersOnPort portIndex 1
I/MediaCodec(17293): [onMessageReceived]строка:1268 [OMX.MTK.VIDEO.DECODER.VP9][what=kWhatShutdownCompleted][state 10][msg='AMessage(what = 'codc', target = 5) = {
I/MediaCodec(17293): int32_t что = 1935896429
I/MediaCodec(17293): }' ]
I/MediaCodec(17293): [~MediaCodec]строка:205 [][mState 0]+++
E/flutter (17293): [ОШИБКА:flutter/lib/ui/ui_dart_state.cc(148)] Необработанное исключение: MissingPluginException (не найдена реализация для метода AssessmentJavascript на канале plugins.flutter.io/webview_0)
E/flutter (17293): #0 MethodChannel.invokeMethod (package:flutter/src/services/platform_channel.dart:314:7)
Э/флаттер (17293):
E/flutter (17293): #1 MethodChannelWebViewPlatform.evaluateJavascript (package:webview_flutter/src/webview_method_channel.dart:90:21)
E/flutter (17293): #2 WebViewController.evaluateJavascript (package:webview_flutter/webview_flutter.dart:626:39)
E/flutter (17293): #3 YoutubePlayerController._callMethod (package:youtube_player_flutter/src/utils/youtube_player_controller.dart:180:32)
E/flutter (17293): #4 YoutubePlayerController.pause (package:youtube_player_flutter/src/utils/youtube_player_controller.dart:194:19)
E/flutter (17293): #5 _VideosScreenState.deactivate (package:youvilist/videosScreen.dart:133:34)
E/flutter (17293): #6 StatefulElement.deactivate (package:flutter/src/widgets/framework.dart:4135:12)
E/flutter (17293): #7 _InactiveElements._deactivateRecursively (package:flutter/src/widgets/framework.dart:1756:13)
E/flutter (17293): #8 SingleChildRenderObjectElement.visitChildren (package:flutter/src/widgets/framework.dart:5115:14)
E/flutter (17293): #9 _InactiveElements._deactivateRecursively (package:flutter/src/widgets/framework.dart:1758:13)
E/flutter (17293): #10 ComponentElement.visitChildren (package:flutter/src/widgets/framework.dart:3990:14)
E/flutter (17293): #11 _InactiveElements._deactivateRecursively (package:flutter/src/widgets/framework.dart:1758:13)
E/flutter (17293): #12 SingleChildRenderObjectElement.visitChildren (package:flutter/src/widgets/framework.dart:5115:14)
E/flutter (17293): #13 _InactiveElements._deactivateRecursively (package:flutter/src/widgets/framework.dart:1758:13)
E/flutter (17293): #14 SingleChildRenderObjectElement.visitChildren (package:flutter/src/widgets/framework.dart:5115:14)
E/flutter (17293): #15 _InactiveElements._deactivateRecursively (package:flutter/src/widgets/framework.dart:1758:13)
E/flutter (17293): #16 SingleChildRenderObjectElement.visitChildren (package:flutter/src/widgets/framework.dart:5115:14)
E/flutter (17293): #17 _InactiveElements._deactivateRecursively (package:flutter/src/widgets/framework.dart:1758:13)
E/flutter (17293): #18 SingleChildRenderObjectElement.visitChildren (package:flutter/src/widgets/framework.dart:5115:14)
E/flutter (17293): #19 _InactiveElements._deactivateRecursively (package:flutter/src/widgets/framework.dart:1758:13)
E/flutter (17293): #20 ComponentElement.visitChildren (package:flutter/src/widgets/framework.dart:3990:14)
E/flutter (17293): #21 _InactiveElements._deactivateRecursively (package:flutter/src/widgets/framework.dart:1758:13)
E/flutter (17293): #22 ComponentElement.visitChildren (package:flutter/src/widgets/framework.dart:3990:14)
E/flutter (17293): #23 _InactiveElements._deactivateRecursively (package:flutter/src/widgets/framework.dart:1758:13)
E/flutter (17293): #24 ComponentElement.visitChildren (package:flutter/src/widgets/framework.dart:3990:14)
E/flutter (17293): #25 _InactiveElements._deactivateRecursively (package:flutter/src/widgets/framework.dart:1758:13)
E/flutter (17293): #26 SingleChildRenderObjectElement.visitChildren (package:flutter/src/widgets/framework.dart:5115:14)
E/flutter (17293): #27 _InactiveElements._deactivateRecursively (package:flutter/src/widgets/framework.dart:1758:13)
E/flutter (17293): #28 ComponentElement.visitChildren (package:flutter/src/widgets/framework.dart:3990:14)
E/flutter (17293): #29 _InactiveElements._deactivateRecursively (package:flutter/src/widgets/framework.dart:1758:13)
E/flutter (17293): #30 SingleChildRenderObjectElement.visitChildren (package:flutter/src/widgets/framework.dart:5115:14)
E/flutter (17293): #31 _InactiveElements._deactivateRecursively (package:flutter/src/widgets/framework.dart:1758:13)
E/flutter (17293): #32 ComponentElement.visitChildren (package:flutter/src/widgets/framework.dart:3990:14)
E/flutter (17293): #33 _InactiveElements._deactivateRecursively (package:flutter/src/widgets/framework.dart:1758:13)
E/flutter (17293): #34 ComponentElement.visitChildren (package:flutter/src/widgets/framework.dart:3990:14)
E/flutter (17293): #35 _InactiveElements._deactivateRecursively (package:flutter/src/widgets/framework.dart:1758:13)
E/flutter (17293): #36 SingleChildRenderObjectElement.visitChildren (package:flutter/src/widgets/framework.dart:5115:14)
E/flutter (17293): #37 _InactiveElements._deactivateRecursively (package:flutter/src/widgets/framework.dart:1758:13)
E / флаттер (17293): # 38
W/chromium(17293): [ПРЕДУПРЕЖДЕНИЕ:aw_network_delegate.cc(86)] https://r1---sn-nx5cvox-5uie.googlevideo.com/videoplayback?expire=1574443433&ei=ScXXXdWBL-TyxgKpl6m4Cw&ip=193.140.87.3&id= о-AF9ENbMJOc9OV4_Vekvta7EBAEi0vBUovMb0P1U1ZsBL & ITAG = 248 & aitags = 133% 2C134% 2C135% 2C136% 2C137% 2C160% 2C242% 2C243% 2C244% 2C247% 2C248% 2C278 & источник = YouTube & RequireSSL = да & мм = 31% 2C29 & Mn = СН-nx5cvox-5uie% 2Csn-nv47lnsy & мс = аи% 2Crdu & мв = м & Mvi = 0 & пл = 22 & initcwndbps = 652500 & мим = видео% 2Fwebm & гир = да & Clen = 167339651 & Dur = 1537,920 & LMT = 1570277496757063 & т = 1574421761 & fvip = 1 & KeepAlive = да & Fexp = 23842630 & с = WEB_EMBEDDED_PLAYER & TXP = 5535432 & sparams = истекают% 2Cei% 2Cip% 2Cid% 2Caitags% 2Csource% 2Crequiressl% 2Cmime % 2Cgir% 2Cclen% 2Cdur% 2Clmt & сиг = ALgxI2wwRgIhAOsRGl_ihaPDxnSFt_2PeeuiQ9wAOw7qpXSrZLniIAn2AiEAgvZLPGOc2uPcqQtKuCuknRk6spcWaQ1Ops0Ff7ucV-Y% 3D & lsparams = мм% 2Cmn% 2Cms% 2Cmv% 2Cmvi% 2Cpl% 2Cinitcwndbps & LSIG = AHylml4wRQIgVci2Rv - Q2ngHQ_cosnpEL1lYD13oiqr71DdTHXOYMACIQDYW1uinNm8Mk6Esy8uLh2UObVCy7Eiw8HQGHgbhrtBNg% 3D% 3D & ALR = да и КПН = PjP8wnSh2Ki85Zot & cver = 20191 121&диапазон=4746501-6314657&rn=9&rbuf=27201#-3#1
E/chromium(17293): [ОШИБКА:deferred_gpu_command_service.cc(76)] Нет аппаратного рендерера. Вероятен тупик