Error port 80 for renew

Hi,

My domain is: www.domain.myds.me
My operating system is (include version): DSM 6.2
My web server is (include version): nginx

I'm tring to renew my LE certificates but still get "failed to open port 80." error.
My port 80 is open (http://www.domain.myds.me and https://www.domain.myds.me are availables and redirected on web station nginx ! )

/usr/syno/sbin/syno-letsencrypt renew-all -v command output:

DEBUG: check need to renew. [/usr/syno/etc/certificate/_archive/2ny8sN/]
DEBUG: renew info is not json. [/usr/syno/etc/certificate/_archive/2ny8sN/]
DEBUG: check need to renew. [/usr/syno/etc/certificate/_archive/3vPNNT/]
DEBUG: start to renew [/usr/syno/etc/certificate/_archive/3vPNNT/].
DEBUG: setup acme url https://acme-v01.api.letsencrypt.org/directory
DEBUG: GET Request: https://acme-v01.api.letsencrypt.org/directory
DEBUG: strat to do new-authz for video.domain.myds.me
DEBUG: ==> start new authz.
DEBUG: new authz: do new-authz.
DEBUG: Post JWS Request: https://acme-v01.api.letsencrypt.org/acme/new-authz
DEBUG: Post Request: https://acme-v01.api.letsencrypt.org/acme/new-authz
DEBUG: new authz: setup challenge env.
DEBUG: new authz: http-01 challenge.
DEBUG: Post JWS Request: https://acme-v01.api.letsencrypt.org/acme/challenge/gK3F4KXDCBM6DJ-0YIRiJMQM79mXFhuSYlsqROYxyvU/997814033
DEBUG: Post Request: https://acme-v01.api.letsencrypt.org/acme/challenge/gK3F4KXDCBM6DJ-0YIRiJMQM79mXFhuSYlsqROYxyvU/997814033
DEBUG: new authz: http-01 check result.
DEBUG: GET Request: https://acme-v01.api.letsencrypt.org/acme/authz/gK3F4KXDCBM6DJ-0YIRiJMQM79mXFhuSYlsqROYxyvU
DEBUG: GET Request: https://acme-v01.api.letsencrypt.org/acme/authz/gK3F4KXDCBM6DJ-0YIRiJMQM79mXFhuSYlsqROYxyvU
DEBUG: ==> start new authz.
DEBUG: new authz: do new-authz.
DEBUG: Post JWS Request: https://acme-v01.api.letsencrypt.org/acme/new-authz
DEBUG: Post Request: https://acme-v01.api.letsencrypt.org/acme/new-authz
DEBUG: DDNS Curl: [https://ddns.synology.com/main.php?_=letsencrypt%2Fdelete&hostname=&myds_id=291781&auth_key=75c61c0625162128f0c388e076647d392e12b5a00036230e570d65c586b92cc6f18bea3f4cfa5e9e&serial=CBKRN02622&txt=]
DEBUG: GET Request: https://ddns.synology.com/main.php?_=letsencrypt%2Fdelete&hostname=&myds_id=291781&auth_key=75c61c0625162128f0c388e076647d392e12b5a00036230e570d65c586b92cc6f18bea3f4cfa5e9e&serial=CBKRN02622&txt=
DEBUG: Dns01 challenge: Teardown [{"code":"badparam"}].
DEBUG: DNS challenge failed, reason: { "error": 200, "msg": "new_authz: unexpect httpcode.", "file": "client.cpp:364"}
DEBUG: Normal challenge failed, reason: { "error": 107, "msg": "video.domain.myds.me: Could not connect to video.domain.myds.me", "file": "client.cpp:315"}
DEBUG: failed to open port 80.
DEBUG: close port 80.
DEBUG: Failed to renew /usr/syno/etc/certificate/_archive/3vPNNT/. { "error": 101, "msg": "failed to open port 80.", "file": "client.cpp:472"}

Please any idea ? My certificate expire tomorrow
I don't know what could be wrong

Thank you
Z.

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