title: Magento 2 category URL disabled
body: <p>On my Magento 2.2.2 store I'm adding new categories. But it seems that on all new, but also the old existing categories. I'm unable to change the URL Key under the 'Seach Engine optimization' tab.</p>
  <p>The URL is shown, but it's greyed out and the input field is disabled.</p>
  <p><a href="https://i.stack.imgur.com/oRlzb.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/oRlzb.png" alt="enter image description here" /></a></p>
  <p>How can I change the category URL?</p>