When I want to access my wordpress website, it only works when I have the full SSL selected. However, I created a new subdomain, and I cannot access it with full SSL, only on flexible. How can I access both sites without having to constantly change my SSL settings on cloudflare?
Make sure your webserver also has a valid certificate for your newly create hostname. You probably need to contact your host about that. Never use Flexible, as that is insecure and keeps your visitors at risk.