If you experienced a connection error it does not automatically mean that there is something wrong or broken in the game. It usually means the following;
- Your internet connection might be having issues. This is caused by an intermittent connection or your internet speed is being affected by torrents, streams and/or large downloads.
- There maybe some issues with the server connection or the game is under Maintenance.
It is always best that you follow and check the Official Puzzle Trooper page and check for updates regarding such error.
If you are sure that you have a stable connection and found no updates regarding the server, you can always try to do a Basic Troubleshooting first before you send us your concern.