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Killing Floor 3 (KF3)

Failed to Authenticate Error and How to Fix

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Killing Floor III - Failed to Authenticate Error

The Failed to Authenticate Error is one of the network issues that the player can experience in Killing Floor 3 (KF3). See how to fix the Failed to Authenticate Error, as well as the cause for it here!

List of Contents

How to Fix Failed to Authenticate Error

Double-Check Antivirus and Firewall

As the Authentication Error is a network issue, the first thing to do is to open your Antivirus and Firewall programs and ensure that Killing Floor 3 and Easy Anti-Cheat are not flagged as malicious programs.

You must also double-check your Antivirus' quarantined files and make sure that none of Killing Floor 3's files have been quarantined.

Check For Easy Anti-Cheat Status

If those programs and settings are in order, your next bet is to check if Easy Anti-Cheat is correctly installed.

Run The Easy Anti-Cheat EOS Setup

Navigate to your Easy Anti-Cheat folder in your Killing Floor 3 directory and run the EasyAntiCheat EOS Setup file in order to install or reinstall Easy Anti-Cheat.

Verify Game Files

If everything seems to be in order, you can try to verify Killing Floor 3's files through the Steam Library by right-clicking on it, going to properties, and verifying the integrity of game files under the installed files tab.

What Causes Failed to Authenticate Error

Game Was Unable to Reach Online Services

This error usually occurs when the game's client is unable to reach the servers due to a problem on the game client's end, as opposed to the Hydra Error where the problem is more server-sided.

Killing Floor 3 Related Guides

Killing Floor 3 Bugs and Issues

List of Known Bugs and Issues

All Known Bugs and Issues

List of Known Bugs and Issues
Missing Rewards for Elite Nightfall Edition Matchmaking Not Working
Stuttering and Frame Drops Hydra Error
Frequent Crashing Out of Video Memory
Failed to Authenticate Error Unable to Load Profile Data

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