EDIT: I've had two offers of help, and one of them pointed out a possible issue already. I'm hopeful that it's already at least partially resolved, and may be fully resolved later today.

I'm aware of the site performance issues. It appears to be some kind of issue with TLS, probably a configuration problem in my Apache setup, but I've yet to be able to track down the problem because the server log files don't seem to want to tell me anything about it.

Is there anyone reading who knows how to manage configurations like this? The setup is Ubuntu 22.04 with Apache. I'd appreciate any help you might be able to provide; I expect someone who knows better what they're doing to be able to solve this pretty quick, but I'm flying blind. Please feel free to e-mail me via the contact info on the Contact page.