"Shadowbringers unregistered" error messages when joining 71+ instances

[ShinjiHaji]

Date & Time: 06.07.2019 23:59 CET
Frequency: happens since today
World name: Shiva
Character name: Shinji Hagi
Class/Level: White Mage/Level 80
In-game time: 9:59 p.m.

Steps:
1. Go into dungeon finder
2. Try to select anything Level 71+
3. Can't join -> message "Shadowbringers unregistered"

Yesterday I could join every 71+ dungeon, today it does not work anymore.

I registered my Shadowbringers weeks ago on the Mogstation. In the Mogstation, it says my Shadowbringers is not registered. When I try to re-enter the code, Mogstation tells me "Code is already registered" (probably because I used it a weeks ago).

[JWag12787]

Did you use your new code? Or your preorder code?

[ShinjiHaji]

Back then, I used my pre-order code, and today I tried the same code. I didn't get any other code.

EDIT: I just went through my emails and found the "real" code. Everything is working now. Sorry for the inconvinience.