Satisfactory Server Troubleshooting

Fix common Satisfactory server problems — authentication errors, timeouts, save issues, and performance.

"Invalid Authentication Token" / "Encryption Token Missing"

Cause: Players used "Join Game" instead of Server Manager.

Fix: Connect via Server Manager from the main menu, NOT "Join Game."

Cause: System clock mismatch between client and server.

Fix: Ensure both systems have correct date/time/timezone. If persistent, delete ServerSettings.7777.sav and restart.

Increase timeouts in Engine.ini:

[/Script/OnlineSubsystemUtils.IpNetDriver]
InitialConnectTimeout=60.0
ConnectionTimeout=60.0

LogEOSP2P: NAT Detection Failed and LogEOSAnalytics warnings are harmless — ignore them.

The server process must be running for ports to show open. Verify with:

nmap -sT -sU <ip> -p 7777

If trains stop loading/unloading, load the save in single-player, rebuild Train Stations, save, then upload back.