title: Google Forms - This form contains features which require sign in
body: <p><strong>Dears,</strong> </p>
  
  <p>I created a Google Form with ability to upload file option. 
  It works fine for me when I'm logged-in. </p>
  
  <p>I have shared the link with my friends after making it public to all. </p>
  
  <p>It keeps giving me the following message:</p>
  
  <p><a href="https://i.stack.imgur.com/OSdaq.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/OSdaq.png" alt="Look at this!"></a></p>
  
  <p>I make sure that "Requires sign in:" --> "Limit to 1 response" is NOT enabled. </p>
  
  <p>Also, this Quiz is NOT enabled. </p>
  
  <p>What's wrong?</p>
  
  <p>Note that I'm using new version of Google Forms.</p>