I got an email, that our certificat has not been renewed. When I try certbot renew I get an Error Message.
Attempting to renew cert (amstetten.at) from /etc/letsencrypt/renewal/amstetten.at.conf produced an unexpecte d error: Failed authorization procedure. amstetten.at (http-01): urn:ietf:params:acme:error:connection :: The server could not connect to the client to verify the domain :: Fetching http://amstetten.at/.well-known/acme -challenge/8YV1XpaGnt2iap-4yi4f_zGrE843VZV8Il4xFc48Z6w: Error getting validation data. Skipping.
Can anybody help me? I think I did not change anything, what could cause this problem?
Thank you and best regards,