Lemmy.ml, the most popular instance fo Lemmy out there, is not accessible in my country unless I use a VPN. But, I can subscribe to any community that exists on lemmy.ml from here and even post on those communities from this account.
I love this aspect of Lemmy.
Yeah I got the same thing all day yesterday. It now seems to be fixed on my end. Likely hasnt propagates to your DNS server yet since they updated their server.