Baldur's Gate 3 Error Code 804: How to Fix Multiplayer Disconnect

Easy 15–45 minutes Medium Severity Verified June 2026
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Error Code
804
Brand
Popular Games
Product Type
game
Severity
Medium
DIY Difficulty
Easy
Estimated Fix Time
15–45 minutes
Baldur's Gate 3 Error Code 804 is a multiplayer connectivity error that occurs when the game loses its connection to another player's session or the Larian Studios servers, forcing you out of a co-op game. It can be triggered by unstable internet connections, firewall restrictions, outdated game files, or server-side outages. The good news is that most cases of Error Code 804 can be resolved with a few straightforward troubleshooting steps on your end.
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Tools You'll Need

How to Fix Error Code 804

  1. Check Larian Studios Server Status

  2. Restart the Game and Your Router

  3. Verify Game File Integrity

  4. Allow BG3 Through Your Firewall and Antivirus

    Only add exclusions for applications you trust. Disabling your firewall entirely is not recommended.

  5. Switch to a Wired (Ethernet) Connection

  6. Disable VPN or Proxy Services

  7. Update Network Drivers and Game Platform

  8. Check and Match Game Versions with Your Co-op Partner

  9. Disable Mods Temporarily

    Back up your save files before disabling or changing mods to avoid save corruption.
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When to Call a Professional

If you have completed all troubleshooting steps and Error Code 804 persists exclusively on your network — even when other players on different networks can connect fine — the issue may be with your ISP blocking specific UDP ports required by BG3. In that case, contact your Internet Service Provider and ask them to check for port filtering or NAT restrictions on your account. You can also submit a support ticket directly to Larian Studios at support.larian.com with your DxDiag report and a description of the steps you have already tried.

Frequently Asked Questions

What does Error Code 804 mean in Baldur's Gate 3?
Error Code 804 in Baldur's Gate 3 indicates a multiplayer session disconnection. This means the game lost its network connection to either the host's session or Larian's servers, which causes all players to be dropped from the co-op game. It is not a save-corruption error and your progress is typically preserved from the last save point.
Can Error 804 in BG3 cause save data loss?
In most cases, no. Baldur's Gate 3 uses periodic auto-saves and quick-saves during multiplayer, so a disconnect usually only rolls back progress to the most recent save. However, it is always a good habit to manually save frequently during co-op sessions to minimize any potential lost progress from a sudden disconnect.
Does BG3 Error Code 804 happen on PS5 and Xbox too?
Yes, Error Code 804 can occur on PS5 and Xbox Series X/S as well as PC. On consoles, start by checking your NAT type in the network settings — you want NAT Type 2 (Moderate) or better, and NAT Type 1 (Open) is ideal. NAT Type 3 (Strict) will frequently cause multiplayer issues including Error 804.
Why does BG3 Error 804 only happen mid-session and not when joining?
A mid-session disconnect with Error 804 is typically caused by intermittent network instability — such as Wi-Fi packet drops, a congested home network, or your ISP briefly dropping your connection — rather than a configuration problem. Switching to a wired Ethernet connection and reducing other network usage (streaming, downloads) on your home network during play can significantly reduce mid-session disconnects.
Do mods cause BG3 Error Code 804 in multiplayer?
Yes, mods are a common but often overlooked cause of Error 804 in multiplayer. All players in a BG3 co-op session must have the exact same mods installed in the same load order. A single mismatched or outdated mod between players can cause immediate or mid-session disconnects. Always coordinate mod lists with your co-op partners and verify everyone is using the same versions before starting a session.

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