Anno 1800 Lan Multiplayer Fixed Instant

Anno 1800’s LAN multiplayer can be unreliable or broken for some players — this guide walks you through causes, fixes, and preventative tips so you can get stable local multiplayer sessions with friends. Use the checklist and troubleshooting steps below in order; try the quick fixes first, then follow deeper troubleshooting if problems persist.

| Error Code | Meaning | The LAN Fix | | :--- | :--- | :--- | | Error 0x800401 | Relay server timeout | Switch to Direct Connection. The host is trying to use Ubisoft servers. | | Desync (CTD) | Packet loss | Check your Ethernet cables. Disable WiFi on both PCs if hardwired. | | "Unable to join" | Port 18000 blocked | Manually forward ports OR disable Windows Defender entirely for 5 mins to test. | | Endless Loading | IPv6 conflict | Disable IPv6 on your Network Adapter properties. Force IPv4. | Anno 1800’s LAN multiplayer can be unreliable or

Forget what the game tells you. Do not use "Internet Game." Known issue: “Failed to join” on LAN