try to re-install the game or also do this
go on your desktop where your my computer icon is and press left click then properties then :
1)On the left of the screen there is somewhere saying Advanced system Settings and click that
2)A new window will pop up and click on the tap with the name Advance and then where is says Performance click the settings
3)A new window will pop up again the then click on the tap with the name Data Execution Prevention
4)Now Click on Turn On DEP for all..blalba
5)finally click the add button and the find your warrock.exe which is normally store in C:\Nexon\Warrock EU\system add it.
6)And now your ready to go!
Hope this helps you because i had the same problem before and when i did that hacks working fine for me!
Also maybe it will request to do a restart so do it if it ask you!