Near exact same thing for me, even same cutscene and location as my last known whereabouts before non-stop 90002 errors. Haven't been able to log on since but only on this one character, all alts work fine. Same situation where Datacenter travel works for Crystal, Aether and Dynamis, but once I try to return to Primal, shoots the 90002 error right after world queue and loading splash screen shows up. This has happened on multiple systems and after all suggested troubleshooting (fresh install, different system, different network, reset everything, etc). Hope this gets looked at very soon, can do some stuff by Datacenter travel off of Primal, but cannot check retainers, housing, etc.

Date of issue: Jan 10, 2023 until present (Jan 12, 2023)
Frequency: Any attempted login to Primal datacenter using Kirishoto Azphina@Excalibur
World name: Excalibur
Character: Kirishoto Azphina@Excalibur
Class/Level: MCH90
Party or solo: Solo
Area and coordinates: Radz-at-Han (X:4.4 Y:9.8) (Character screen now shows I am in Ul Dah because of datacenter travel but haven't seen for myself due to instant 90002 error on login)

Not meaning to hijack the thread but your situation is 99% the same as mine. Please fix!