Character Data Error renders me unable to log in with main character

[neola]

I would recommend one thing.
On the character select screen, right click your character and attempt to login to a different server.
This will rezone your character to one of the starter cities on another server, then you can transfer back.
If the error is related to the place your character was logged out this might provide a work around.

Edit:
Also, if you are able to login using the "login to another world" trick, if the game still crashes, you could try to abandon the quest and restart it.
Some quests can not be abandoned but it is worth a shot. Perhaps some strange rare bug showed up when accepting the quest or during quest progress.

If none of this works, I don't know how, but the character data may need to be examined but this is not something trivial and would require someone in the support team or development team to look into.

If you have any real life friends that also play the came, you might see if you can use their PC to attempt to login to the game. This will for sure resolve the question of whether it is a character data issue, or a PC related issue.
PlayStation versions might be locked to accounts, I am not familiar with this, but I believe only one account can be linked to a PlayStation at any given time and requires assistance to unlink it.