Not able run release build

Hi,

I am not able to run release build in Android using flutter run --release command because i am getting below error please help me that.

[ERROR:flutter/lib/ui/ui_dart_state.cc(186)] Unhandled Exception: MissingPluginException(No implementation found for method initialize on channel vn.hunghd/downloader)
E/flutter ( 9310): #0 MethodChannel._invokeMethod (package:flutter/src/services/platform_channel.dart:156)
E/flutter ( 9310):
E/flutter ( 9310): #1 FlutterDownloader.initialize (package:flutter_downloader/src/downloader.dart:36)
E/flutter ( 9310):
E/flutter ( 9310): #2 main (package:surge/main.dart:27)
E/flutter ( 9310):

Flutter doctor:

Doctor summary (to see all details, run flutter doctor -v):
[✓] Flutter (Channel stable, 2.0.4, on Mac OS X 10.15.7 19H2 darwin-x64, locale en-IN)
[✓] Android toolchain - develop for Android devices (Android SDK version 29.0.3)
[!] Xcode - develop for iOS and macOS
! Xcode 11.6.0 out of date (12.0.1 is recommended).
Download the latest version or update via the Mac App Store.
! CocoaPods 1.8.4 out of date (1.10.0 is recommended).
CocoaPods is used to retrieve the iOS and macOS platform side's plugin code that responds to your plugin usage on the Dart side.
Without CocoaPods, plugins will not work on iOS or macOS.
For more info, see https://flutter.dev/platform-plugins
To upgrade see https://guides.cocoapods.org/using/getting-started.html#installation for instructions.
[✓] Chrome - develop for the web
[✓] Android Studio (version 3.5)
[✓] VS Code (version 1.55.1)
[✓] Connected device (2 available)