On Game Launcher, Configuration button, Check Support Logs - Output logs for support checkbox.
Start the game. Wait until about 60 seconds after the game has fully loaded then Exit the game.
Make sure your game is OFFLINE before continuing...
Click Browse/Choose File button, navigate to your \logs\ folder (by default this would be at C:\Program Files (x86)\Istaria\logs).
Select the file that contains "client_net_log_##-##_#.txt" (ie client_net_log_09-21-20_17_08_18.txt). Click Upload button.
Maximum File Size: 25.00 Mb
Upload Timeout: 360s