Found the answer!
Here’s what I had to do
Make sure folder /var/tmp exists (mine was deleted so had to recreate it)
Then copy com.docker.vmnetd.plist from DockerApp content to /Library/LaunchDaemons/
Then apply the following workaround by synic (see Install error: Fatal Error: Communication with networking components failed) (adding the middle line)
$ chmod 600 /Library/LaunchDaemons/com.docker.vmnetd.plist
$ sudo chown root /Library/LaunchDaemons/com.docker.vmnetd.plist
$ sudo launchctl load -Fw /Library/LaunchDaemons/com.docker.vmnetd.plist