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It's not just you. I've been unable to log in for several hours now. Many are reporting the same thing. Seems the actual game server is up, since people are still playing, but there's an issue connecting to the update server, which needs to happen to log in. Also all mindark websites are...
Edit: Since OP has been edited, there's no need for this rant...
But yeah, it does suck if there are exploitable bugs that people don't report. All we can do is send those bug reports in, and also send in reports about the exploiters (to MA/PP... not to forum users)