Killing Floor 3 Load Error 4 PS5 | Steps to Fix

If you are seeing “Hydra Error: 4” (or just Error 4) in Killing Floor 3 on PS5, it is almost certainly a Server-Side Issue, not a problem with your console.

This error code typically means the game servers are down for maintenance, being patched, or are currently overloaded (common right now since the game just launched on PlayStation Plus for December 2025).

Here is what you can do to fix it or work around it:

1. The Most Likely Fix: Wait & Retry

Since “Error 4” indicates the server is unreachable or undergoing maintenance:

• Check Server Status: Look at the official Tripwire Interactive Twitter/X or the Killing Floor Discord. If they are pushing a hotfix, you cannot play until the maintenance ends.

• Restart the Game: Sometimes the client needs to “catch up” to a new server version. Close the game app completely and restart it to force a reconnection attempt.

2. The “Loadout” Bug (If You Are Stuck Loading)

If you are getting this error specifically when trying to join a match (stuck on the loading screen), it might be a known bug related to custom loadouts.

• The Fix: Go to your Armory/Loadouts menu and delete your custom loadouts.

  • Why? A known bug in the current version causes connection timeouts if you have too many custom weapon presets saved (specifically more than 10). Deleting them often resolves the “failed to join” errors instantly.

Also Read : NBA 2K26 Squad Invite Not Working

3. DNS Workaround (For Connection Stability)

If you are the only one of your friends getting this error, your ISP might be struggling to connect to the game’s authentication servers.

• Go to Settings > Network > Settings > Set Up Internet Connection.

• Hover over your network, press Options (three lines button), and select Advanced Settings.

• Change DNS Settings to Manual:

  • Primary: 8.8.8.8 (Google) or 1.1.1.1 (Cloudflare)

  • Secondary: 8.8.4.4 or 1.0.0.1

• This helps bypass local ISP routing issues that trigger “Hydra” errors.

Summary