Using Plesk, I initially assigned 'Let's Encrypt' SSL certificate to my domain and sub-domain, however my sub-domain (https://) did not work.

I have removed the SSL certificate for both domain and sub-domain, can someone please check if this is working as I had a redirect code (http:// to https://) in my .htaccess file, which I have removed within the file.

Also in the future, if I purchase a SSL certificate with wildcard, would both domain and sub-domain (https://) work successfully with bloxby?