title: Errors occurred:Technical error: Unexpected response returned by server. Import stopped. - Prestashop 1.7.1.1
body: <p>I'm importing my old prestashop data to new site with updated prestashop (ver. 1.7.1.1). When I'm importing the category csv file I got this error </p>
  
  <p><code>Errors occurred:Technical error: Unexpected response returned by server. Import stopped.</code></p>
  
  <p>I've got other csv's naming products,customers and manufacturers. So which csv is first imported to prestashop ? I've got bit confused here.
  Is there anyone can help me ? Any help is appreciated. I'm attaching the screenshot of error here.<a href="https://i.stack.imgur.com/w5d3X.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/w5d3X.jpg" alt="enter image description here"></a></p>