Character: Mortinae Kahlissi (and all others on NA/EU, including new character creation on all worlds)
World: Behemoth

After logging into the game and selecting the character, the game loads, but immediately freezes after the loading screen with 0 data being received from server.
After around 30-60 seconds, Error 90000.

Have tried with Firewall and Anitvirus disabled, with router and without, swapped routers, used different ISP accounts as well as tested on 3G/LTE. Reinstalled and updated all system drivers. Completed Windows Update.
All of the above in any possible combination also tested.