Lan Multiplayer Fixed __exclusive__ | Anno 1800

Ensure Ubisoft Connect is running in online mode initially. The game requires an active handshake with Ubisoft servers to authenticate ownership before opening local lobbies.

What or behavior (e.g., infinite loading, LR40 error, invisible lobby) are you encountering?

: Many players have resolved immediate connection failures and "LR40" desync errors by disabling IPv6 on their network adapter settings in Windows. anno 1800 lan multiplayer fixed

Desyncs happen when one player’s game state stops matching the others. This often triggers an "LR40" error.

All players install the same VPN tool and join the same virtual network. Ensure Ubisoft Connect is running in online mode initially

Save the changes and restart your router to apply the new rules. 2. Standardize IPv4 and Disable IPv6

Even after port forwarding, you may encounter specific error codes. Here is how to handle them. : Many players have resolved immediate connection failures

If you're unable to join friends or keep getting "LR40" desync errors, follow these steps: Verify Game Files: Ensure everyone is on the exact same version via Ubisoft Connect Sync Your Mods: If using mods, every player must have the exact same mod folders and versions installed. The Anno Union

Delete the temporary files inside these folders to clear old session data.

Start with simple client-side checks, use the Ubisoft Connect overlay for invites, and verify server status. If problems persist, move on to consistent fixes like enabling UPnP and configuring port forwarding for your router. For persistent issues on the same local network, more advanced configurations like managing double NAT or using a DMZ may be necessary.