When I enable the webserver, it works for a while but then stops accepting requests. A simple cURL command will result in:
curl: (7) Failed to connect to IP port #: Connection refused.
If I uncheck the webserver option and re-enable it, it will work for a few hours and then stop working again. I'm on version 2.660 (968). It happens on two Mac (one is on 10.14 and another is on 10.13).