さくらvps nginx Let’s EncryptのSSLを導入する方法

centos7
nginx
cakephp3

で lets encryptを導入しようとしています。

エラーが出ているので教えて下さい。

導入したいドメイン
twiseo.net

certbot-auto certonly --webroot -w /usr/share/nginx/html -d twiseo.net

をやった結果以下のエラーになります。

[root@tk2-262-40877 ~]# certbot-auto certonly --webroot -w /usr/share/nginx/html -d twiseo.net
Failed authorization procedure. twiseo.net (http-01): urn:acme:error:unauthorized :: The client lacks sufficient authorization :: The key authorization file from the server did not match this challenge [pqnkztx9NhNuMOoDk6G2nPz--fzfi1WoqBl-S1Pe6X8.k_hEXPch4QPWpDc-ra81s4s12Qc9ht3y257MICyFmrA] != []

IMPORTANT NOTES:
 - The following errors were reported by the server:

   Domain: twiseo.net
   Type:   unauthorized
   Detail: The key authorization file from the server did not match
   this challenge
   [pqnkztx9NhNuMOoDk6G2nPz--fzfi1WoqBl-S1Pe6X8.k_hEXPch4QPWpDc-ra81s4s12Qc9ht3y257MICyFmrA]
   != []

   To fix these errors, please make sure that your domain name was
   entered correctly and the DNS A record(s) for that domain
   contain(s) the right IP address.

[root@tk2-262-40877 ~]# curl -i http://twiseo.net/.well-known/acme-challenge/q9wpciWTM8DjxJ99uA3AFgFhcJQXxthLKhTuaJQXqk4
HTTP/1.1 200 OK
Server: nginx
Date: Sun, 21 Aug 2016 02:49:18 GMT
Content-Type: text/plain;charset=UTF-8
Transfer-Encoding: chunked
Connection: keep-alive
X-Powered-By: PHP/7.0.9

となります。

[root@tk2-262-40877 ~]# nslookup
> ^C[root@tk2-262-40877 ~]# nslookup twiseo.net
Server:         210.188.224.11
Address:        210.188.224.11#53

Non-authoritative answer:
Name:   twiseo.net
Address: 160.16.241.131