Okay, got it. @MikeMcQ , thanks for checking that the certs did, in fact, come through!
In that case, here's where we are: I'm self-hosting an icecast2 server, and using stream.transmission-reception.com as the domain. The icecast server is running on ports 80 and 443, one secure and one not.
I can visit http://stream.transmission-reception.com:80 and :443 as expected. However, both show up as Not Secure in my browser.
I also cannot visit neither at https://stream.transmission-reception.com.
Ultimately, I need the stream to be secure in order to play properly on the homepage