Domoticz Challenge failed for domain

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My domain is:

I ran this command: sudo /etc/letsencrypt/letsencrypt-auto certonly --webroot --email -d -w /home/pi/domoticz/www/ --debug-challenges

It produced this output:

Challenge failed for domain
http-01 challenge for
Cleaning up challenges
Some challenges have failed.


My web server is (include version): Domoticz v 4.10717

The operating system my web server runs on is (include version): Debian 10 (buster)

My hosting provider, if applicable, is: —

I can login to a root shell on my machine (yes or no, or I don’t know): Yes

I’m using a control panel to manage my site (no, or provide the name and version of the control panel): no

The version of my client is (e.g. output of certbot --version or certbot-auto --version if you’re using Certbot): certbot 0.31.0

My server is already accessible via internet (port 80 and 443)
I used DDNS from Synology.

Thank you for your help

Hi @wakior

your configuration is completely curious - see

You have ipv4 and ipv6:

Host T IP-Address is auth. ∑ Queries ∑ Timeout A Clichy-sous-Bois/Île-de-France/France (FR) - Proxad / Free SAS Hostname: yes 1 0
AAAA 2a01:e0a:2b5:d940:211:32ff:fe94:1093 Nanterre/Île-de-France/France (FR) - Free SAS yes

And you have created a certificate - today:

Issuer not before not after Domain names LE-Duplicate next LE
Let's Encrypt Authority X3 2020-02-07 2020-05-07 - 1 entries duplicate nr. 1

And your ipv6 - works, the certificate is used:

Only your ipv4 doesn't work.

So I don't understand your error message - because you have created a new certificate today.

And check your ipv4 configuration, so your ipv4 uses your certificate.

It’s the NAS.
When I configured de DDNS, he ask me to configure a certificate. but I don’t have access to the certificate created by Synology with letsencrypt.
May be I had to refuse when the NAS asked me to configure certificate with letsencrypt.

For the IP, It’s my provider I don’t have hand on it. (IP4 an IP6)

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