title: Flutter doctor is not running in command prompt
body: <p>I have been using flutter smoothly before this but suddenly when I run flutter doctor in my command prompt I get the following error.</p>
  
  <blockquote>
    <p>Updating flutter tool...
    Could not find a file named "pubspec.yaml" in "C:\Users\personal\AppData\Roaming\Pub\Cache\hosted\pub.dartlang.org\linter-0.1.43".
    Error: Unable to 'pub upgrade' flutter tool. Retrying in five seconds...</p>
  </blockquote>
  
  <p>I have also uninstalled the flutter and dart plugin from the android studio but it didn't help.</p>