I was trying to set up my own domain with Micro. blog, and also connect it to Bluesky. I kept getting security warnings, and no site. It’s probably just down to me wanting everything to work almost immediately. I’ve been around long enough to know it takes time for DNS to propagate fully, and sometimes, even when it appears to have done so, it can ‘drop out’ again for a while until it’s fully settled. That can take up to 48 hours, although these days, it’s usually much quicker.