Error message during installation on Plesk


#1

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My domain is: vps284212.ovh.net

My operating system is (include version): Ubuntu 14.04.4 LTS‬ (on my pc i use windows 10)

My web server is (include version): vps

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

I’m using a control panel to manage my site (no, or provide the name and version of the control panel): yes it is Plesk version 12.5.30

Hello, i get an error message when i try to install let’s encrypt on my vps via Plesk panel.
Here is the message :
Error: Let’s Encrypt SSL certificate installation failed: Failed letsencrypt execution: Saving debug log to /opt/psa/var/modules/letsencrypt/logs/letsencrypt.log
Obtaining a new certificate
Performing the following challenges:
http-01 challenge for vps284212.ovh.net
http-01 challenge for www.vps284212.ovh.net
Waiting for verification…
Cleaning up challenges
Failed authorization procedure. www.vps284212.ovh.net (http-01): urn:acme:error:connection :: The server could not connect to the client to verify the domain :: DNS problem: NXDOMAIN looking up A for www.vps284212.ovh.net
IMPORTANT NOTES:

  • The following errors were reported by the server:

Domain: www.vps284212.ovh.net
Type: connection
Detail: DNS problem: NXDOMAIN looking up A for
www.vps284212.ovh.net

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. Additionally, please check that
your computer has a publicly routable IP address and that no
firewalls are preventing the server from communicating with the
client. If you’re using the webroot plugin, you should also verify
that you are serving files from the webroot path you provided.

My domain is right an IP is right too.
What can i do please??


#2

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