Challenge failed for domain xxx
http-01 challenge for xxx
Cleaning up challenges
Some challenges have failed.
The following errors were reported by the server:
Detail: Remote PerformValidation RPC failed
Unfortunately, an error on the ACME server prevented you from
completing authorization. Please try again later.
126.96.36.199 - - [03/Sep/2019:17:37:07 +0200] “GET /.well-known/acme-challenge/2Lq-8MXHwNQ9EronO58v5XfDVhQYLLRSatFNEEZYo_Y HTTP/1.1” 200 87 “-” “Mozilla/5.0 (compatible; Let’s Encrypt validation server; +https://www.letsencrypt.org)”
with dry run