I just installed a fresh copy of MapleRoyals and it's telling me that the game is offline. It's not antivirus considering I don't have any installed on my computer. It's ran as administrator, and it's in compatibility mode. Can't really think of what else would cause it?
If it happens when you try to start the client, it's a problem on your end either a network issue or you have an antivirus or firewall active blocking you.