My domain is: dementia-counselling.co.uk which is a WordPress site.
When I type www.dementia-counselling.co.uk as a URL, the certificate does not work. I have had the certificate since last October and successfully renewed it.
I installed the certificate using Really Simple SSL plugin which now indicates an error "Could not verify alias domain. Please check if the www version of your site also points to this website. If this is not the case, don't add this alias to your certificate." This seems to be a recent thing. I checked the DNS records and there is a CNAME record www.dementia-counselling.co.uk.
In Cpanel (SSL status section) - it states that I don't have a certificate for www.dementia-counselling.co.uk - only for dementia-counselling.co.uk. I don't know if it is relevant, but in the WordPress General Settings I give the site URL as dementia-counselling.co.uk (i.e. without the www).
Please accept my apologies that my technical knowledge is clearly way below most of you here - that's why I used the Really Simple SSL plugin but I would appreciate it if anyone could guide me as to how to correct this problem e.g. uninstall Really Simple SSL/the certificate ... or is there something relatively simple I could do to correct the problem?
My web server is (include version): Don't know.
The operating system my web server runs on is (include version): Don't know.
My hosting provider, if applicable, is: TSO Host (now part of GoDaddy)
I can login to a root shell on my machine (yes or no, or I don't know): 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): - I'm using CPANEL to manually install the certificates once Really Simple SSL has produced the keys.
The version of my client is (e.g. output of
certbot --version or
certbot-auto --version if you're using Certbot): I am not using these.