Satisfactory
Most Satisfactory server issues fall into a handful of well-known patterns. This guide covers the most common ones and how to fix them. If you're dealing with lag or rubber-banding specifically, or something mod-related, we've got dedicated guides for those linked at the bottom.
"No EncryptionToken specified, disconnecting" or Can't Join
This is almost always caused by trying to connect through the Join Game option on the main menu instead of Server Manager. Satisfactory dedicated servers aren't meant to be joined that way.
The joining guide in Related Guides below covers this in full, including the first-time setup flow.
Certificate Warnings
A plain certificate warning on first connect
This is expected. Your server generates its own self-signed certificate that the game can't verify automatically. Click Confirm to trust it.
"Certificate Verify Result: certificate is not yet valid"
This one means a clock mismatch, usually on your own computer. Check that your system's date, time, and timezone are set correctly, then try connecting again.
If it persists, the issue may be a stale certificate on the server itself. Open a support ticket and our team can help reset it, this involves resetting the server's claim, so it isn't something to do without assistance.
Phantom Player (Duplicate Character)
If you get disconnected unexpectedly, sometimes from a bad connection or a server restart, you may find a duplicate of your own character standing around when you reconnect, holding all the inventory you had at the time. You'll spawn with an empty inventory instead. This is a long-standing game bug, sometimes called the idle player or offline clone bug.
Server Crashes or Won't Start
Running out of memory
Larger factories and more connected players both increase how much RAM your server needs. If crashes are frequent and consistently tied to memory, an upgrade is worth it, see the lag guide in Related Guides below for when a RAM upgrade actually helps versus when it won't fix the problem.
A corrupted autosave blocking startup
Rare, but it happens, whatever was going on in-game right as an autosave triggered caused it to save incorrectly, and now the server won't start at all.
.config/Epic/FactoryGame/Saved/SaveGames/server.If it still won't start, repeat with the next most recent save. If you're not comfortable doing this yourself, open a support ticket and our team can help.
Trains Not Loading or Unloading
If a train stops properly loading or unloading cargo at a station, this is a known engine issue with the affected Train Station rather than anything wrong with your server.
Harmless Warnings You Can Ignore
If you check your server's Console after startup, you may see two warning messages referencing EOS (Epic Online Services), NAT Detection Failed and an EOS Analytics warning. Both are completely normal and don't indicate anything is actually wrong, the server has no real interaction with those systems and is otherwise fine.
Related Guides
Dedicated fixes for lag, rubber-banding and desync on your server.
Get your server starting again after adding or updating mods.
Full walkthrough of joining through Server Manager, including first-time setup.
Still stuck?
Our team is happy to help. Open a ticket through the live chat button in the bottom-right corner of our website, or join our Discord and open a ticket there.
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