SSL not valid on PC but ok on mobile and laptop

i am getting this message this certificate is not valid (expired root) I dont know what to do.

Is this an issue with the certificate authority or how the ssl certificate is setup? I assume its not CA but would appreicate any advice?

SSL checker said The Certificate is not issued by DigiCert, GeoTrust, Thawte, or RapidSSL. Also Insecure TLS ciphers supported by the server. Not sure if that helps

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):

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


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