Error (90002 sometimes 90001)

[HyoMinPark]

This is just based on my experience, but I've noticed that I get the 90002 error if something happens on my end that interrupts my connection to server (e.g., power goes out, and therefore my internet connection is interrupted, so I dc), so I wonder if it's related to connection to your network. Even hardwired it's possible to still have issues--when I played on PS4, sometimes it would think I wasn't connected (gives me that LAN connection pop-up error), and I would always get 90002. And just this morning, I was running Dun Scaith when my power went out, and I 90002'd.

You may need to talk to your ISP, tell them about the issue, and see if they can do anything about it. Because I don't think it's related to your system (unless, for some reason, your Ethernet port or cable is malfunctioning).

As for the 90001 error, I have no idea what it could be. I've only ever gotten 90002 or 90006 errors.