Restart Mod. If you crash try reset all settings. Note that if you restart your progress is not lost.
The auto restart mod creates a file named restart in a subdirectory named auto restart and writes 1 into it. 1 means that server crashed. For safe mode press the number key 4 or f4 key on your keyboard.
If the server stops there are three possible status codes written in the restart file.
If you failed a mission just wait for some seconds and you will be shown a text box. For safe mode press the number key 4 or f4 key on your keyboard. 0 means the server was shutdown with the stop command and should be stopped. Note that if you restart your progress is not lost.