The only login related message I see in that log file is “Player canceled login process.”. Was “Please Wait” being displayed, and you hit the cancel button? Are you still seeing other errors? You said you were earlier, but only mentioned the LE-15 code.
Unfortunately if that’s the only error you’re seeing it points to the problem being with the setup on your end. I haven’t heard any other reports of people being unable to login to the game client.
Besides what you have already done, I would recommend flushing your DNS cache as that has occasionally helped people before. If you can attempt to login to the game via another internet connection that would help pinpoint where the issue, but I realize that might not be a practical option.