StyleGaming didn't work for me because it said they were updating.
However, Lunia Zero seems to work (Lunia Zero™ - ONLINE
). You need to download three files and install them all to get the game to work.
There's a pretty decently sized community and most of the characters are there (except Gaon, Arta and Ralph). There is no cash shop and you level and get items at the same rate as the normal game.
I would recommend the server.