What happened to SSL certificates

[Meishin]

Then read

@Admin

Reminder: “www” Subdomains Are Not Covered

Due to the way wildcard SSL certificates work, subdomains like www.example.ct.ws are not covered by the system-wide SSL certificate. Only direct subdomains (e.g., example.ct.ws) are supported.

If your site uses a www. subdomain, we recommend switching to the non-www version to ensure your visitors stay protected with HTTPS.

Existing custom certificates for www subdomains will continue to work until they expire. After that, they cannot be renewed.

And this

@Admin

You can’t. That functionality was removed. There is no workaround.

You must ensure that you always visit your site over the non-www version.