Когда я пытаюсь получить зависимости проекта во флаттере, у меня всегда возникает одна и та же проблема

Question

У меня всегда возникает эта проблема, когда я пытаюсь запустить эту команду в терминале

flutter pub get

в терминале отображается следующая ошибка:

$ flutter pub get
fatal: bad config line 1 in file .git/config
Building flutter tool...
/c/Users/Dheeraj/flutter/bin/flutter: line 46: /c/Users/Dheeraj/flutter/bin/cache/dart-sdk/bin/pub: No such file or directory       
Error: Unable to 'pub upgrade' flutter tool. Retrying in five seconds... (9 tries left)
/c/Users/Dheeraj/flutter/bin/flutter: line 46: /c/Users/Dheeraj/flutter/bin/cache/dart-sdk/bin/pub: No such file or directory       
Error: Unable to 'pub upgrade' flutter tool. Retrying in five seconds... (8 tries left)
/c/Users/Dheeraj/flutter/bin/flutter: line 46: /c/Users/Dheeraj/flutter/bin/cache/dart-sdk/bin/pub: No such file or directory       
Error: Unable to 'pub upgrade' flutter tool. Retrying in five seconds... (7 tries left)
/c/Users/Dheeraj/flutter/bin/flutter: line 46: /c/Users/Dheeraj/flutter/bin/cache/dart-sdk/bin/pub: No such file or directory       
Error: Unable to 'pub upgrade' flutter tool. Retrying in five seconds... (6 tries left)
/c/Users/Dheeraj/flutter/bin/flutter: line 46: /c/Users/Dheeraj/flutter/bin/cache/dart-sdk/bin/pub: No such file or directory       
Error: Unable to 'pub upgrade' flutter tool. Retrying in five seconds... (5 tries left)
/c/Users/Dheeraj/flutter/bin/flutter: line 46: /c/Users/Dheeraj/flutter/bin/cache/dart-sdk/bin/pub: No such file or directory       
Error: Unable to 'pub upgrade' flutter tool. Retrying in five seconds... (4 tries left)
/c/Users/Dheeraj/flutter/bin/flutter: line 46: /c/Users/Dheeraj/flutter/bin/cache/dart-sdk/bin/pub: No such file or directory       
Error: Unable to 'pub upgrade' flutter tool. Retrying in five seconds... (3 tries left)
/c/Users/Dheeraj/flutter/bin/flutter: line 46: /c/Users/Dheeraj/flutter/bin/cache/dart-sdk/bin/pub: No such file or directory       
Error: Unable to 'pub upgrade' flutter tool. Retrying in five seconds... (2 tries left)
/c/Users/Dheeraj/flutter/bin/flutter: line 46: /c/Users/Dheeraj/flutter/bin/cache/dart-sdk/bin/pub: No such file or directory     
Error: Unable to 'pub upgrade' flutter tool. Retrying in five seconds... (1 tries left)
Command 'pub upgrade' still failed after 10 tries, giving up.

это мой pubspe c .yaml файл:

name: application
description: A new Flutter project.

publish_to: 'none' 

version: 1.0.0+1

environment:
  sdk: ">=2.7.0 <3.0.0"

dependencies:
  flutter:
    sdk: flutter
  cupertino_icons: ^0.1.3
  pin_code_fields: 
  firebase_core: 
  cloud_firestore: 
  firebase_auth: 


dev_dependencies:
  flutter_test:
    sdk: flutter

flutter:

  uses-material-design: true

  assets:
    - images/background.jpg

Не только flutter pub get, хотя я пытаюсь запустить любую команду, например flutter doctor или flutter, но у меня также возникает та же проблема, как ее восстановить.