title: IntelliJ after update i can't load dart/flutter plugin
body: <p>I updated IntelliJ community version via IntelliJ toolbox and now i can't run my code. Flutter doctor says that everything is ok.
  In IntelliJ -> Settings -> Plugins, installed -> i don't see flutter or dart plugins and in plugins market is endless loading.
  I tried uninstall but the problem persists</p>
  
  <p><a href="https://i.stack.imgur.com/TYLMQ.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/TYLMQ.png" alt="situation"></a></p>