Fortnite Error Code MS-CHAP: How to Fix It

Easy 15-45 minutes Medium Severity Verified June 2026
Summarize with ChatGPTSummarize with ClaudeSummarize with Perplexity Add as Preferred Source on Google
Error Code
MS-CHAP
Brand
Fortnite
Product Type
game
Severity
Medium
DIY Difficulty
Easy
Estimated Fix Time
15-45 minutes
Fortnite error code MS-CHAP is a voice chat authentication error that occurs when the game fails to verify your credentials with Epic Games' voice communication servers. This typically happens due to network configuration issues, outdated app data, or account permission problems. The good news is that this error can almost always be resolved through software-level fixes without any special tools or hardware.
Ad

Tools You'll Need

How to Fix Error Code MS-CHAP

  1. Restart Fortnite and the Epic Games Launcher

  2. Check Voice Chat Settings Inside Fortnite

  3. Verify Your Epic Games Account Permissions

  4. Flush DNS Cache and Reset Network Settings

    Resetting Winsock on Windows can temporarily affect other internet applications. Save all open work before running these commands and be prepared to restart your PC.

  5. Check for Firewall or Router Port Blocking

    Only adjust firewall rules for trusted applications. Do not disable your firewall entirely, as this poses a security risk.

  6. Clear Fortnite and Epic Games Cache

  7. Reinstall Fortnite as a Last Resort

    Ensure you remember your Epic Games login credentials before uninstalling, as you will need them to re-download and log back in.
Ad

When to Call a Professional

Contact Epic Games Support (support.epicgames.com) if the MS-CHAP error persists after completing all steps, especially if your account shows unusual activity, your voice chat permissions appear restricted at the account level, or if you believe your account has been compromised. Epic's support team can investigate server-side authentication issues and account flags that cannot be resolved through client-side troubleshooting. If you suspect a network-level block (such as on a corporate or ISP-level firewall), contact your internet service provider or network administrator.

Frequently Asked Questions

What does Fortnite error code MS-CHAP mean?
MS-CHAP stands for Microsoft Challenge Handshake Authentication Protocol. In Fortnite, this error means the game failed to complete authentication with Epic Games' voice chat servers, preventing voice communication from working in-game.
Does MS-CHAP affect my gameplay or just voice chat?
The MS-CHAP error only affects Fortnite's voice chat feature. You can still play the game normally, use text chat, and access all other features. Only in-game voice communication will be unavailable until the error is resolved.
Why does Fortnite MS-CHAP error keep coming back after I fix it?
If the error returns repeatedly, the most common causes are an unstable internet connection, a router that periodically blocks the required voice chat ports, or a background application conflicting with Fortnite's network traffic. Try setting a static local IP for your gaming device and configuring permanent port forwarding on your router.
Can the MS-CHAP error be caused by Epic Games server issues?
Yes. If Epic Games' voice authentication servers are experiencing downtime or degraded performance, you may see the MS-CHAP error even if nothing is wrong on your end. Check the Epic Games Status page at status.epicgames.com to see if voice services are impacted before spending time troubleshooting locally.
Does MS-CHAP error happen on all platforms or just PC?
The MS-CHAP voice chat authentication error can occur on all platforms that support Fortnite voice chat, including PC, PlayStation, Xbox, Nintendo Switch, and mobile. The fix steps vary slightly by platform but the root cause — a failed voice server authentication handshake — is the same across all devices.

Related Error Codes