Reason/Fix: Invalid game session. Restart the game from theHunter web site. (Check if your account has a username, if it does not contact email@example.com http://support.thehunter.com/hc/en-us/articles/203575058-Error-16001-No-Username)
Reason/Fix: Failed to connect to theHunter game server. The game server is having problems. Please try again a bit later.
Reason/Fix: Invalid operating system. theHunter only runs on Windows 7, Windows 8 Windows 8.1 and Windows 10.
Reason/Fix: The game has not been started through the launcher. Restart the game from theHunter web site.
Reason/Fix: The game has crashed and a debug .dmp file has been uploaded to the game server.
Reason/Fix: Only one instance of the game can run on one computer. Reboot, Restart the game.
Reason/Fix: Invalid settings file version. Please update the game settings in the launcher settings menu.
Reason/Fix: Error occurred within the launcher. Reboot and start a new hunt. Didn't work? Reinstall the launcher: http://www.thehunter.com/download
Reason/Fix: Firewall related. Check that the Launcher and theHunter are allowed through your firewall.
Reason/Fix: Your machine may not meet the minimum requirements. Send the following to support: http://thehunter.zendesk.com/entries/25871127-Create-A-DXDIAG-Report