The site is hosted on Google Cloud Run, which seems to have been having some intermittent problems for the last couple of days. EDIT: some other people have had the same issue and the Cloud Run team are investigating

Looks like this issue: https://issuetracker.google.com/issues/136539678

Yep — I added our details to it. I mentioned the problems we were having on Twitter and a Cloud Run PM came to help immediately! So I'm hopeful we'll get a resolution before long. (Aside from this glitch, Cloud Run has been great for us, and we're looking forward to it coming out of beta)

Not visible without signing in to google.

Sounds like a very Google-cloud/appengine issue. Maybe it's time to rewrite a bunch of things(very appengine again)

Go directly to https://svelte-website-mrf26sti4q-uc.a.run.app/ and it seems to be working fine.

I was getting this intermittently an hour or so ago, too.