Seems to be the same problem but will provide more useful info than a simple complaint.

Server: Cactuar
Zone: Lower La Noseca
Duty Attempted: Sastasha
Character: U'Lafihna Vashai
Class: Arcanist Lv.15

I joined Sastasha via Duty Finder and was instantly given a party found commence/Withdraw button. After hitting Commence the usual readying party popup was replace with one that showed only 1 icon of a person and 1/1 under it instead of the usual 3 Icons (Tank 1/1 Healer 1/1, DPS 2/2).

This popup sat on screen for about 45-60 seconds and the screen blacked out and began loading as if I were entering Sastasha. After about 10-30seconds of loading I was met with "Error 90000" and returned to the start screen.

When trying to log in again I seem to be permanently met with "Error 10102" Connection with the server was lost. After 15min+ I am still unable to log in. Seems similar to the permanent lock out issues experienced before that needed emergency maintenance.