Please create a file in your web server's base directory.
It must be reachable at:http://igen.dev/.well-known/acme-challenge/W-LsGYcLi9-oJLQMZVoA08qMPKHsSpFtKpqgcpcNMiY
File name: W-LsGYcLi9-oJLQMZVoA08qMPKHsSpFtKpqgcpcNMiY
Content: W-LsGYcLi9-oJLQMZVoA08qMPKHsSpFtKpqgcpcNMiY.oSaJK4pr4x4AbAkQUPtJ90Tidg8cZl4NpXGt5cwO-TA
The file must not contain any leading or trailing whitespaces or line breaks!
The Content-Type header must be either text/plain or absent
The request is sent to port 80 only. There is no way to choose a different port, for security reasons.
The challenge is completed when the CA was able to download that file and found content in it.