You also need to forward http (80) traffic to https (443). If there is no vhost for port 80 for your panel, you will get the problem you have 
Basically you need an http and https virtualhost entry for your panel. Right now, your server does not know what to do with requests to your panel url when called with http.
Checking on how to do it using the custom vhost entry.
Basically you need an http and https virtualhost entry for your panel. Right now, your server does not know what to do with requests to your panel url when called with http.
Checking on how to do it using the custom vhost entry.
