SSL: Issued, but can't visit my site via HTTPS, hosted on Oracle Cloud Infrastructure

Like the title says, Squarespace says that my SSL certificate has been issued for my domain. I'm confident that my DNS record is edited properly because I can visit my site via HTTP, but not with HTTPS. 

Is this something I have to tinker with on my host's end?

If so, could anybody lead me in the right direction? I'm using an Apache server, running on Oracle Linux (based on Red Hat Enterprise Linux). 

Thanks in advance