sweden.se is fine; it's identity.sweden.se that's having some problems. This is a really limited site with a target audience that's normally in the hundreds, perhaps thousands, of developers. It's probably just running on a cheap server/VPS somewhere, which is fine almost all of the time.
Sorry, I know HN isn’t a support forum, but am I the only one who gets “Safari couldn’t establish a secure connection” to any of the archive.xx sites? It’s been happening for ages now.
In short if you use Cloudflare's 1.1.1.1 DNS then some archive.is domains won't load so you should perhaps use another DNS server.
Edit: Not because 1.1.1.1 is in the wrong it is just what the person behind archive.is recommends as he will not be changing his position and neither will Cloudflare so it's a bit of a stalemate.
It's the other way around. The site blocks Cloudflare for some political reasons that have been mentioned here before, but I can't remember what they were.
I thought it was because Cloudflare DNS doesn't pass on the full IP subnet of the requesting computer, which archive.is wants. archive.is says they need it for better CDN routing, CloudFlare says it's a privacy violation and there are enough CloudFlare PoPs to provide for CDN granularity just by going off the requesting server.
I think we hugged it to death.