I'm having an issue similar to this. I'm getting an "unknown error" within every few minutes of logging on, and yet, my internet connection is working flawlessly. Not the first time this has happened to me.
Our teams have identified a resolution for the "unknown error" issue.
If you’re still experiencing this issue, please reach out to our Support Team with your Game Consultant File so that an agent can work with you directly to resolve the problem.
As a reminder, please do not post your Game Consultant File on the forums, as it does contain private information about your computer.
If you already submitted a ticket, do not hesitate to answer it for updating it. One of our agent will be in touch as soon as possible.