flutter - 当我按下按钮时，显示此错误

Question

我遵循了本教程：

https://suragch.medium.com/playing-short-audio-clips-in-flutter-with-just-audio-3c80eb7eb6ea

但是当我按下按钮时，我得到了这个错误：

[ERROR:flutter/lib/ui/ui_dart_state.cc(199)] Unhandled Exception: MissingPluginException(No implementation found for method init on channel com.ryanheise.just_audio.methods)
#0      MethodChannel._invokeMethod (package:flutter/src/services/platform_channel.dart:156:7)
<asynchronous suspension>
#1      MethodChannelJustAudio.init (package:just_audio_platform_interface/method_channel_just_audio.dart:13:5)
<asynchronous suspension>
#2      AudioPlayer._setPlatformActive.setPlatform (package:just_audio/just_audio.dart:1260:13)
<asynchronous suspension>