errors.com.epicgames.mcpprofilegroup.connection_failure - Fortnite Fix Guide

SECTION 1: OVERVIEW

The errors.com.epicgames.mcpprofilegroup.connection_failure is a critical network session error in Fortnite. This error indicates a failure in the client's ability to maintain a stable connection to the Epic Games matchmaking and game state services. It is not a general internet outage but a specific disruption in the data channel Fortnite uses for real-time gameplay synchronization. The error predominantly manifests on PC and Nintendo Switch platforms, particularly following major game updates or specific Windows network driver updates. Its severity is high, as it completely prevents match participation and, in documented cases on PC, can cause a full loss of local network connectivity requiring a system reboot.

SECTION 2: SYMPTOMS

The application successfully launches and the user can log into their Epic Games account. The player can select a game mode and enter the pre-game lobby. The lobby countdown timer proceeds normally. The player's character model becomes unresponsive and cannot move, while other players may continue to move and emote. Upon the match's scheduled start time, the player is not loaded into the island. The player is forcibly returned to the Fortnite lobby interface. The errors.com.epicgames.mcpprofilegroup.connection_failure message is displayed. On PC, a critical secondary symptom is the complete loss of the system's active network connection; the network adapter appears disabled or without a valid IP address until the operating system is restarted.

SECTION 3: COMMON CAUSES

• Corrupted Local Network Cache: Stale or corrupted data in the Epic Games Launcher's web cache interferes with clean session handshakes.
• Faulty Network Driver: Specific versions of Killer Networking Suite or Realtek PCIe Ethernet drivers contain aggressive power-saving or traffic-shaping features that disrupt persistent UDP connections used by Fortnite.
• IPV6 Configuration Conflict: Improperly configured or prioritized IPV6 stack on the local PC can cause routing conflicts with game servers.
• Overly Restrictive Firewall Rule: A Windows Defender Firewall or third-party antivirus rule may allow initial connection but block subsequent data packets required for the live session.
• DNS Resolution Failure: The configured Domain Name System server fails to reliably resolve the dynamic endpoints used by Epic Games services.
• Router NAT Table Flood/Corruption: The home router's Network Address Translation table becomes saturated or corrupted, failing to manage the multiple simultaneous connections initiated by the game.
• Background Software Conflict: VPN clients, proxy software, or "optimization" utilities that hook into the Windows networking stack can prematurely terminate game connections.

SECTION 4: SOLUTIONS

Solutions are ordered from highest to lowest probability of resolving the specific symptom of connection failure followed by internet loss.

Solution 1: Reset Network Stack & Clear Launcher Cache

• Close the Epic Games Launcher completely via the system tray icon.
• Press the Windows key, type cmd, right-click on "Command Prompt," and select "Run as administrator."
• Execute the following commands in order, pressing Enter after each:

• Restart your computer.
• Navigate to C:\Users\[YourUsername]\AppData\Local\EpicGamesLauncher\Saved. Delete the webcache folder and the webcache_4147 folder if present.
• Relaunch the Epic Games Launcher and start Fortnite.

Solution 2: Update or Replace Problematic Network Driver

• Press Windows Key + X and select "Device Manager."
• Expand the "Network adapters" section.
• Right-click on your primary network adapter (e.g., "Killer(R) Wi-Fi 6 AX1650," "Realtek PCIe GbE Family Controller") and select "Properties."
• Navigate to the "Driver" tab and note the "Driver Version."
• Visit your PC manufacturer's (Dell, HP, etc.) or motherboard manufacturer's support website—not the generic Intel/Killer/Realtek site. Search for your specific model and download the latest approved network driver.
• Install the downloaded driver. If you are already on the latest version and the problem persists, consider a driver rollback or replacement:

Solution 3: Disable IPV6 and Configure Google DNS

• Press Windows Key + R, type ncpa.cpl, and press Enter.
• Right-click your active network connection and select "Properties."
• Uncheck the box next to "Internet Protocol Version 6 (TCP/IPv6)."
• Select "Internet Protocol Version 4 (TCP/IPv4)" and click "Properties."
• Select "Use the following DNS server addresses."
• Enter 8.8.8.8 for the Preferred DNS server and 8.8.4.4 for the Alternate DNS server.
• Click "OK" on all open windows.
• Open Command Prompt as Administrator (see Solution 1, Step 2) and run ipconfig /flushdns.

Solution 4: Create Specific Firewall Rules

• Press Windows Key, type "Windows Defender Firewall," and select "Windows Defender Firewall with Advanced Security."
• In the left pane, click "Outbound Rules." In the right pane, click "New Rule..."
• Select "Program" and click Next. Click "Browse" and navigate to C:\Program Files\Epic Games\Fortnite\FortniteGame\Binaries\Win64\FortniteClient-Win64-Shipping.exe. Select it and click Next.
• Select "Allow the connection." Click Next.
• Ensure all boxes (Domain, Private, Public) are checked. Click Next.
• Name the rule "Fortnite Game Client - Allow All." Click Finish.
• Repeat Steps 2-6 for the Epic Games Launcher executable, typically found at C:\Program Files (x86)\Epic Games\Launcher\Portal\Binaries\Win32\EpicGamesLauncher.exe. Name this rule "Epic Launcher - Allow All."

Solution 5: Power Cycle Network Hardware

• Fully shut down your computer.
• Unplug the power cable from your modem and your router. If they are combined, unplug the single device.
• Wait for 60 seconds.
• Plug the modem back in and wait for all status lights to stabilize (approximately 2 minutes).
• Plug the router back in and wait for it to fully boot (approximately 2 minutes).
• Boot your computer and test Fortnite.

SECTION 5: PREVENTION

Maintain a regular schedule of updating your network driver from your hardware manufacturer's website, avoiding automatic updates from Windows Update for this component. Perform a full network stack reset (Solution 1) and clear the Epic Games Launcher webcache folder after every major Fortnite game update. Configure your power plan to prevent the network adapter from sleeping: in Device Manager, under your adapter's Properties > Power Management, uncheck "Allow the computer to turn off this device to save power." Conduct a monthly power cycle of your home router and modem.

SECTION 6: SUPPORT ESCALATION

Contact Epic Games Player Support if all above solutions fail and the error persists across multiple internet connections. Prior to contacting support, gather the following diagnostic information: your Epic Games account email, the exact make/model of your network adapter and driver version (from Device Manager), and the results of a traceroute command (tracert 8.8.8.8) run from Command Prompt. Provide a detailed timeline of the error and all troubleshooting steps already performed.