Error - Certificate isn't trusted, RemoteCertificateNameMismatch

Thank you very much @schoen.
It worked perfectly.
Now my website has an A grade.
Have a great day.

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Hi @letsencryptdeb,

Your certificate covers the base name example.eu but not the subdomain www.example.eu. Most browsers check that the certificate includes the exact name that the user has used to reach the site, so in this case it will work via https://example.eu/ but not via https://www.example.eu/.

You can make sure that your Apache VirtualHost contains a ServerAlias record for the www subdomain name, and then use Certbot or another ACME client again to get a single certificate covering both. After installing that, it should work fine.

[Edited after your confirmation that it worked because I'm guessing you edited your own post to obscure the specific domain name.]

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