Good day to all the readers and in advance thank you for all the help you can give me. A few days ago searching the internet I found that you can generate SSL certificates for free and in fact followed the steps of a tutorial and the certificate worked perfectly, the problem is that the certificate (it seems) covers only the domain as such and not allows me to specify port 8080 (since the application is developed in JSP), that is, if I place link the site opens correctly, but if I place link (as it really is), the site gives me the error ERR_SSL_PROTOCOL_ERROR.
I thank in advance who knows what configuration I must do to allow the port to be specified.
It should be noted that the certificate I got in Cloudflare.
Thank you very much.