I have used Valet without problems for nearly a year, though occasionally needed a restart or reinstall to get it going. Yesterday I upgraded to a fresh valet 2.0.3 and as a result and ever since then there is no connection in the browser to any of my *.dev hosts (though there is appropriate ping response in the terminal).
Have executed brew update and tried a full reinstall several times (with preceding brew uninstall dnsmasq / php70 etc). There is no error or warning during installation process. Error logs remain empty even after valet start / restart / park commands. Also, there are apparently no caddyfile and Caddy directory generated neither in ~/.valet nor in ~/.composer/vendor/bin/laravel/valet.
An attempt to download Caddy from github and apply it like hinted here had no effect.
As I need valet badly for my work I have researched night and day for any solution, but not succeeded yet. Any hints welcome.
Valet 2 utilizes no more Caddy, but nginx instead. The solution is to uninstall the present nginx via brew and let nginx get reinstalled during the valet installation procedure. As described here by Switzer: https://laracasts.com/discuss/channels/laravel/valet-2-upgrade-all-sites-refuse-to-connect