Please fill out the fields below so we can help you better. Note: you must provide your domain name to get help. Domain names for issued certificates are all made public in Certificate Transparency logs (e.g., so withholding your domain name here does not increase secrecy, but only makes it harder for us to provide help.

My domain is:

I ran this command: Visited the page (Only ONE person has got this error)

It produced this output:

My web server is (include version): Ubuntu 18.04.5 LTS (GNU/Linux 5.3.0-1035-azure x86_64)

The operating system my web server runs on is (include version): Ubuntu 18.04.5 LTS (GNU/Linux 5.3.0-1035-azure x86_64)

My hosting provider, if applicable, is: AWS

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, Using CERTBOT for SSL

The version of my client is (e.g. output of certbot --version or certbot-auto --version if you’re using Certbot): Certbot 1.7.0

Could you please help me debug this issue, I seem to get a fully working SSL for everyone except one person, he gets a ERR_CERT_COMMON_NAME_INVALID. Why is this, and what am I doing wrong?

Hi @BrutalCSkakan

see your screenshot: That person has visited the www version, not the non-www version.

Solution: Create one certificate with both domain names (non-www and www), then use that.

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Thanks for a quick answer!
Unfortunately, I already have the www and non-www setup.

How do you mean? None of the certificates for have a www subdomain?

Then you know your setup is buggy.

Your www has the wrong certificate, so the result is expected.
expires in 90 days,, - 3 entries

See - create a certificate with the www of gg and se and use that. So 5 domain names are required.

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