As many of the others, traveling from Chaos to Light made me able to log in.

Exitlag informs me that I'm being connected via the gateway IP 80.239.145.114

Idk how that makes sense, since the chaos IPs should end at 80.239.145.89 according to https://is.xivup.com/adv

My error also recently changed from 90002 to 10105.