Problem configuration with Letsencrypt


Hi i use Certbot in my server Ubuntu has the generation no worries, the https works perfectly but I notice that on some browser that never visit my site is that indicates an error is displayed , ex : NET:ERR_CERT_COMMON_NAME_INVALID

Do you have an idea to help me?

Thanks in advance



What’s your site?

Thank you


I’ve moved your post to the “Help” category. If you’d created it here, you would’ve seen the following questionnaire. Please fill out the questions below - what you’ve provided isn’t enough for anyone to provide meaningful help. That error simply means that you’re attempting to load a name that’s not on the certificate. Thus, the “My domain is” question is the most important.

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:

It produced this output:

My web server is (include version):

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

My hosting provider, if applicable, is:

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

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


Hi, my website is


Hi @jlaurent

I don’t see an error. Your certificate is valide

there are no mixed content warnings.

Do you know more about the clients with problems?

The only thing: Your website needs SNI-Support:

Very old clients doesn’t support SNI (Server Name Indication).

But SNI is required if a lot of websites with the same ip address want to use their own certificate.

So today SNI support is required, if shared hosting websites want to use SSL - which is good.


Ok thanks, I have a client that told me this error and that is on Windows 10 with Windows Edge


Hi i found solution, i use certbot with this command : certbot --apache --expand -d -d

It’s work now


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