title: Magento CE 2.3.0 - Favicon and Logo upload issue
body: <p>When i try to upload Favicon or logo the following error comes up</p>
  
  <p>A technical problem with the server created an error. Try again to continue what you were doing. If the problem persists, try again later.</p>
  
  <p><strong>Background:</strong></p>
  
  <p>I still haven't applied a theme and tried to upload favicon in HTML Head section (Content-Configuration)</p>