如何解决：plugins.flutter.io/shared_preferences通道getAll方法无实现异常

我被这个问题困扰近半天，尝试使用Flutter的SharedPreferences包存储键值对。当执行await SharedPreferences.getInstance()获取实例时，应用可正常构建运行，但执行到该行代码时崩溃，抛出错误：

MissingPluginException (MissingPluginException(No implementation found for method getAll on channel plugins.flutter.io/shared_preferences))

我查阅过多个StackOverflow帖子及GitHub Issue，但均未解决问题：

• MissingPluginException(No implementation found for method getAll on channel plugins.flutter.io/shared_preferences) while getting FCM in background
• Unhandled Exception: MissingPluginException(No implementation found for method getAll on channel plugins.flutter.io/ for many packages on Flutter
• Flutter Test: MissingPluginException(No implementation found for method getAll on channel plugins.flutter.io/shared_preferences)
• Flutter MissingPluginException(No implementation found for method getAll on channel ...) in release app
• Unhandled Exception: MissingPluginException(No implementation found for method flutterToWatch on channel it.example.watch)
• Flutter: Unhandled exception: MissingPluginException(No implementation found for method getAll on channel plugins.flutter.io/shared_preferences)
• GitHub Issue #98473

我尝试了以下方法，均无效果：

• 执行flutter pub get
• 添加注册代码：io.flutter.plugins.sharedpreferences.SharedPreferencesPlugin.registerWith(registry.registrarFor("io.flutter.plugins.sharedpreferences.SharedPreferencesPlugin"));
• 针对iOS平台添加：SharedPreferencesIOS.registerWith();
• 使用flutter_isolate包
• 执行flutter clean && flutter pub get
• 添加模拟初始化代码：SharedPreferences.setMockInitialValues({});

执行上述操作后，我重启了编辑器（VS Code），甚至安装带Flutter扩展的Android Studio尝试，依旧无效。也试过从命令行运行，仍返回相同错误，还重启了电脑、卸载重装Flutter和Dart，但问题仍存在。

请问我还遗漏了哪些解决步骤？

内容的提问来源于stack exchange，提问作者Awesomeplayer165