Balmung lag and 90K on PC

[Baguette]

As soon as I log in and go to an aetheryte, I get no response from the game. No menu pops up. Within 5 minutes, I get a 90K error (90000 or 90002). I've tried just running to my destination, but I get the 90K error, log back in, and am back where I was before. All other players appear to be frozen and the auction house appears empty. No chat shows up. I can't summon my retainer or talk to NPCs.

This has happened to me all morning and I haven't been able to get anywhere. I've been in touch with my ISP and it's not them. The game worked fine yesterday and has been fine for several months so I don't think it's my PC. And I can't find any notes on outages on Balmung (though I'm new to the server so I may not be looking in the right place).

I'd appreciate any info or advice.