Info box pops up when I try to start the game. It says "Launcher download fail. Please try again later"
Even after waiting and restarting my computer the same message is displayed. I have also re-downloaded the client and selected 'repair' but the result is the same. What can I do for this??

Try starting the game with the application you find in the CyberStep folder (C: by default) and not the shortcut you find on your desktop. I had the same problem yesterday.
Have fun!