You may see a warning message when you try to access your cPanel login, which will vary slightly depending on your browser.
This is common for all but the server name login method, so don’t worry. It occurs because the SSL certificate does not match the domain of your server’s SSL.
There may not be a warning for the server name cPanel login, as the SSL may match your server’s domain. However, some hosting providers do not purchase a third-party certificate but self-sign it. Because you know the identity of your host, and you can verify that the connection is encrypted by clicking on the padlock in the Address Bar, it doesn’t matter. It is worth using this option if it works.