Failed to download servers list. Invalid Signature

Description of issue

Error shown on the server list: “Server list has an invalid signature!”, not allowing the user to access the serverlist on that current instance of the game.

Resolutions

• Restart the game. 

• Restart your PC.

• Perform a Clean Reinstall.

If restarting the game/PC does not work

1. Press Windows + R and enter the following:

   %AppData%\SCP Secret Laboratory\internal\

2. Create a text file named CentralServers.txt.

3. Open it, put this single line, and save:

   GRA2

4. Rename the file to CentralServers (remove the .txt extension via Right‑click → Properties / rename).

5. Launch the game and open the server list.