my first problem is the client is just checking... so i uninstall the game and re-install thats why the error above occurs... please checck the photo i post above
Make sure that you are running the game client without any files being blocked by your anti-virus or Windows firewall.
You can also try running the game directly from your Steam folder just to see if the error is Steam related. Make sure that your game client is fully updated as well upon launching the game.