I had this problem, but I found the way..
Critical error - 1024 / or KOREAN LANGUAGE
there was a problem with my EU client, cuz infinite runs on US..
There's easy way how to repair your client to US version:
1) Start NC launcher, choose File-settings-advanced
2) change your region to North America, English language ...apply,ok
3) click in left menu to AION (right mouse button) and choose REPAIR
it will be repairin' ur game cca 15 - 30 minutes, then you can PLAY! ;]
btw if you have a problem with korean language, that will fix it too ;) so this is 2in1
+1 karma pls if I helped you ;)