I install Laravel via composer and I can run my site via Mamp and other Mac's server environments. I installed Valet and its plugins correctly and I received a message when I type valet in Terminal. But it doesn't work for me and I received ERR_EMPTY_RESPONSE when I want to visit my site in browser.
At the end when I scan 80 port (default port) via netstat -an | grep "\.80" | grep LISTEN there isn't any service running on 80.