title: Why is VSCode "Unable to open Extension. An unknown error occurred."?
body: <p>This is my first time installing and using VSCode, and when I tried installing <a href="https://marketplace.visualstudio.com/items?itemName=esbenp.prettier-vscode" rel="noreferrer">Prettier</a> extension, it let me peek quickly at the extension page before closing it and displaying this notification (Screenshot attached): </p>
  
  <blockquote>
    <p>Unable to open 'Extension: Prettier - Code formatter': An unknown error occurred. Please consult the log for more details..</p>
  </blockquote>
  
  <p><a href="https://i.stack.imgur.com/oxPxk.jpg" rel="noreferrer">VSCode screenshot: Notification at bottom right</a></p>
  
  <p>It's doing this with all other extensions. Searched for a solution but found nothing applicable.
  Why is this happening and how to fix it?</p>