Follow the procedure below.
As stated above by Shoaib.Zafar,
if it still doesn't work, it's probably because of the speed of internet and other internet/wifi connection problems.
where is %APPDATA%/../Roaming/TankiOnline?
First search on start for %appdata% > open that folder > TankiOnline > Local Data
i deleted local store and will it open?
Now download the latest version of client from the homepage, install and run it.
thanks, very much. now it's starting playing game
Customer support service by UserEcho