While run in android getting error

[vipinsaini0]

 MissingPluginException(No implementation found for method startLiveActivity on channel com.example.flutter_application_la/liveActivitiesManager)
      #0      MethodChannel._invokeMethod (package:flutter/src/services/platform_channel.dart:332:7)
      <asynchronous suspension>
      #1      MethodChannel.invokeListMethod (package:flutter/src/services/platform_channel.dart:520:35)
      <asynchronous suspension>
      #2      LiveActivitiesManager.startLiveActivity (package:flutter_application_la/live_actiivties_manager.dart:29:7)
      <asynchronous suspension>

  ____
  
  and if run in iOS, activity is adding but some error showing in logs:

[ERROR:flutter/shell/common/shell.cc(1038)] The 'com.example.flutter_application_la/liveActivitiesCallback' channel sent a message from native to Flutter on a non-platform thread. Platform channel messages must be sent on the platform thread. Failure to do so may result in data loss or crashes, and must be fixed in the plugin or application code creating that channel.
See https://docs.flutter.dev/platform-integration/platform-channels#channels-and-platform-threading for more information.
[ERROR:flutter/runtime/dart_vm_initializer.cc(41)] Unhandled Exception: PlatformException(404, The operation couldn’t be completed. (OneSignal Error error 404.), null, null)
#0      StandardMethodCodec.decodeEnvelope (package:flutter/src/services/message_codecs.dart:651:7)
#1      MethodChannel._invokeMethod (package:flutter/src/services/platform_channel.dart:334:18)
<asynchronous suspension>
#2      OneSignalLiveActivities.enterLiveActivity (package:onesignal_flutter/src/liveactivities.dart:13:14)
<asynchronous suspension>
[ERROR:flutter/runtime/dart_vm_initializer.cc(41)] Unhandled Exception: PlatformException(404, The operation couldn’t be completed. (OneSignal Error error 404.), null, null)
#0      StandardMethodCodec.decodeEnvelope (package:flutter/src/services/message_codecs.dart:651:7)
#1      MethodChannel._invokeMethod (package:flutter/src/services/platform_channel.dart:334:18)
<asynchronous suspension>
#2      OneSignalLiveActivities.enterLiveActivity (package:onesignal_flutter/src/liveactivities.dart:13:14)
<asynchronous suspension>

[vipinsaini0]

Hey @brismithers any update on this issue?