title: Unable to save settings : IntelliJ IDEA
body: <p>I use IntelliJ IDEA 15 and have a problem with the auto-saving. For example I make a new configuration, e.g. Show the line number. When I close IntelliJ and reopen my IDE, it doesn't save my configuration and shows me this message:</p>
  
  <blockquote>
    <p>Unable to save settings : Failed to save settings . Please restart IntelliJ IDEA</p>
  </blockquote>