First i open the launcher as usually, then i press play. And then the launcher dissapears as always, but my game client doesn't open (the login screen does not pop-up).
I have no idea what to do?
I would highly recommend that you look over the resolutions posted in this thread, where another player was experiencing similar problems reaching the log-in screen.
If the issues keep up, you can also get assistance from a technical support specialist by sending in a ticket here.
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