Failed to load asset at path: packages/build_web_compilers/src/dev_compiler/dart_sdk.js.

           Status code: 404

           Headers:
           {
             "date": "Tue, 10 Sep 2019 13:20:56 GMT",
             "content-length": "9",
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             "server": "dart:io with Shelf",
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           Content:
           Not Found

version: 0.0.1

environment:
  sdk: ">=2.4.9 <3.0.0"

dependencies:
  flutter:
    sdk: flutter

  flutter_localizations: 
    sdk: flutter
  cupertino_icons: ^0.1.2
  lottie_flutter: ^0.2.0
  rxdart: ^0.22.0
  transparent_image: ^1.0.0
  page_transition: ^1.1.4
  flutter_range_slider: ^0.0.4
  badges: ^1.1.0
  path_provider: ^1.1.2
  simple_permissions: ^0.1.9
  simple_animations: ^1.3.3
  sembast: ^1.17.2+2
  after_layout: ^1.0.7+2
  http: ^0.12.0+2
  web_socket_channel: ^1.0.15
  socket_io: ^0.9.0+2
  socket_io_client: ^0.9.4
  image: ^2.1.4

dev_dependencies:
  build_runner: ^1.6.1
  build_web_compilers: ^2.1.1
  flutter_test:
    sdk: flutter

flutter:

  uses-material-design: true
  assets:
    - assets/animations/Teddy.flr
    - assets/animations/pa.flr
    - assets/animations/switch_daytime.flr
    
    - assets/languages/fa.json
    - assets/languages/en.json
    - assets/languages/es.json
    - assets/