title: Mamp-PRO 6.x on Mac Catalina can't access the folder with my websites anymore
body: <p>I upgraded from Mamp-PRO 5 to 6 and now all the websites are red.</p>
  <p>In the «document root» field, it says «restricted folder» and when I try to add a new host, I can't select a folder - they're all greyed out.</p>
  <p>My files are located in /myUser/Library/Webserver/Documents/…</p>
  <p>I gave apachectl, httpd and Mamp-Pro full disk access in the system preferences.</p>
  <p>Any idea if I can fix this without moving the whole folder to a different location?</p>
  <p>The exisiting websites are working, though (e.g. I can start Apache and the local websites are responding).</p>
  <p>(running MacOS Catalina)</p>