I have last version of Caddy on Windows.
My caddy file it's just:
matt.life
And when I run caddy.exe (in a cmd with administrator credentials) I get:
Activating privacy features... 2018/06/06 10:27:54 [matt.life] failed to get certificate: acme: Error 403 - urn:ietf:params:acme:error:unauthorized - Invalid response from http://matt.life/.well-known/acme-challenge/icmlZULzOHulTgNJkCTvUrAWbJEbmdz0fs7e2SzEU0E [2604:a880:2:d0::2e7f:8001]: 404
Yeah, you have to use your own domain name, you can't get a certificate for my domain. :)
@mholt but i used my domain but failed,the logs are same

version 0.11
system windows server 2012 R2
@zrzs make sure you're not running another server which is intercepting the traffic
@francislavoie ngnix
Most helpful comment
Yeah, you have to use your own domain name, you can't get a certificate for my domain. :)