Desyncs happen when one player’s game state stops matching the others. This often triggers an "LR40" error.
Ensure everyone is on the same version (e.g., version 18.4). If using mods, every player must have the exact same mods installed and active. Even a single mismatched mod version will trigger a desync immediately. 3. Stability Fixes for Long Sessions anno 1800 lan multiplayer fixed
Long-running multiplayer games can suffer from "lag" when players switch sessions (e.g., moving from the Old World to the New World). Desyncs happen when one player’s game state stops
A common fix for "failed to connect to remote IP" (LR39) is to disable IPv6 on your network adapter. This forces the game to use the more stable IPv4 protocol. version 18.4). If using mods