I don't think that will change anything, but if you can, sure.
I would focus on any firewalls along the way.
Then if that is all open, ensure that port 443 is actually listening on your server:
netstat -pant | grep -i listen
I'm still getting:
curl -Iki https://promis2.laophenixconsulting.com/ curl: (7) Failed to connect to promis2.laophenixconsulting.com port 443: Connection refused
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