Fail to get certificate

Dear all,
I am writing to you because I need your help on getting a certificate.
I am receiving the following error …

c:\caddy>caddy.exe -host
Activating privacy features…2017/05/17 17:41:51 [] fai
led to get certificate: acme: Error 403 - urn:acme:error:unauthorized - Invalid
response from
yXzv1-tQBS1fgi0[]: 404


Hi George,

LetsEncrypt is telling you that it tried to connect to and requested .well-known/acme-challenge/jOwqye1yXzv1-tQBS1fgi0 but was given a 404 error in response.

Since Caddy handles the ACME challenge-response automatically, and a 404 error indicates that some web server did indeed respond (albeit with an error), the most likely problem is that the DNS A record for points to a different server than the one you are running Caddy on.

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Thank you very much for your reply and your help!
The problem was the skype which was using the ports 80 and 443.

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