This is usually caused by a firewall or antivirus application blocking your connection to TLOPO's servers (or more specifically, the port the connection agent uses, which is 7969).
Try disabling your firewall and your antivirus temporarily and launch the game. If it works after doing that, now you know that you may need to add a firewall rule to allow connections to port 7969 or add an exception for TLOPO in your antivirus.