Warhammer 40,000: Darktide Can't Log In? How to Fix Error 2001, 2005, 2014, 3001, 3013, 4001, and Backend Error

Many Warhammer 40,000: Darktide players have recently reported being unable to log in, unable to load into the Mourningstar, or getting disconnected when attempting to join missions.

The most common errors include:

• Backend Error: Error Signing In
• Error 2001
• Error 2005
• Error 2014
• Error 3001
• Error 3013
• Error 4001
• Failed to Load into Mourningstar
• Disconnected When Joining a Mission
• Infinite Reconnect Loop After a Failed Mission Load

This is different from a normal crash or graphics issue. In most cases, the game launches successfully, but it fails to establish a connection with Darktide's backend services.

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Why Can't You Log Into Darktide?

Based on recent player reports, Darktide connection issues usually occur at specific stages of gameplay, including login, loading into the Mourningstar, joining missions, or reconnecting after a disconnect.

In most cases, these problems are related to communication issues between your client and Darktide's backend services.

The underlying causes may include:

• Unstable routing to Darktide servers
• Packet loss
• Backend authentication failures
• Matchmaking service interruptions
• Temporary server-side outages
• Regional network congestion
• Overloaded backend services after updates
• Session synchronization failures during mission loading

Fix 1: Use LagoFast to Stabilize Your Darktide Connection

The first thing you should try is optimizing your connection route to Warhammer 40,000: Darktide.

If your connection to Darktide's backend services is unstable, you may encounter Error 2001, Error 2005, Error 2014, Error 3001, Error 3013, Error 4001, or Backend Error messages even when Steam and other online games are working normally.

LagoFast can help stabilize your connection route to Darktide, reduce packet loss, and improve your chances of successfully loading into the Mourningstar or joining missions.

How to Use LagoFast for Darktide

Close Warhammer 40,000: Darktide.

Fully exit Steam.

Open LagoFast.

Free Trial

Search for Warhammer 40,000: Darktide

Select the game.

Choose the recommended server route.

Click Boost.

Reopen Steam.

Launch Darktide.

Press Space to log in and check whether the Mourningstar loads successfully.

What LagoFast Can Help With

Backend Error during login

Error 2001 login failures

Error 2005 while loading into the Mourningstar

Error 2014 server session connection failures

Error 3001 or 3013 when joining missions

Error 4001 reconnect failures

Reconnect loops after failed mission loads

Unstable connections after updates

High ping or packet loss during missions

Backend connection issues

If the game servers are under maintenance, you may still need to wait. However, if the issue is caused by unstable routing or connection failures between your network and Darktide's backend services, LagoFast is one of the first solutions worth trying.

Fix 2: Check Whether the Error Happens Before or After the Mourningstar

Before changing too many settings, identify exactly where the error occurs.

Case A: The Error Appears After Pressing Space

If you press Space to log in and then see:

Backend Error: Error Signing In

Error 2001

A long loading screen followed by a login failure

No character selection screen

This usually means the game cannot complete backend authentication.

Try the following:

Use LagoFast.

Restart Steam.

Sign out of Steam and sign back in.

Restart your router.

Wait a few minutes and try again.

Case B: The Error Happens While Loading the Mourningstar

If you can select your character but cannot enter the hub area, the issue is likely related to the Mourningstar connection.

Common errors include:

Error 2005

Error 2014

Try the following:

Use LagoFast before launching the game.

Avoid repeatedly clicking reconnect.

Restart the game.

Test another network if available.

Wait and try again later if many players are reporting the same issue.

Case C: The Error Happens When Joining a Mission

If you can enter the Mourningstar but receive an error while joining a mission, the issue may be related to matchmaking or game-session connectivity.

Common errors include:

Error 3001

Error 3013

Error 4001

Try the following:

Leave your strike team.

Restart the game.

Re-enter matchmaking.

Use a more stable route through LagoFast.

Avoid excessive reconnect attempts.

Fix 3: Restart Steam and Refresh Your Login Session

Darktide relies on Steam authentication. If your Steam session is outdated or not functioning properly, backend login attempts may fail.

Steps

Close Darktide.

Right-click the Steam icon in the system tray.

Click Exit Steam.

Wait 10 seconds.

Reopen Steam.

Sign in again if necessary.

Launch Darktide.

If the issue persists, manually log out of Steam and sign back in.

Fix 4: Verify Game Files

If the problem started after a patch, local game files may be incomplete or corrupted.

Steps

• Open Steam.
• Go to Library.
• Right-click Warhammer 40,000: Darktide.
• Select Properties.
• Open Installed Files.
• Click Verify Integrity of Game Files.
• Wait for Steam to finish checking files.
• Restart Steam.
• Launch the game again.

This is especially helpful if Backend Error, Error 2001, Error 2005, or Error 2014 started appearing after a recent update.

Fix 5: Clear the Darktide AppData Cache

If Darktide repeatedly fails to log in or load into the Mourningstar, local configuration files may be contributing to the problem.

Steps

Close Darktide.

Close Steam.

Press Win + R.

Enter:

%appdata%\Fatshark\Darktide

Back up the folder first.

Delete temporary cache or configuration files only if you understand what you are removing.

Restart Steam.

Launch Darktide again.

Always create a backup before making changes.

Fix 6: Allow Darktide Through Your Firewall

Windows Firewall or security software may block Darktide's backend communication after updates.

Steps

Open Windows Security.

Go to Firewall & Network Protection.

Click Allow an App Through Firewall.

Make sure the following are allowed:

Steam

Warhammer 40,000: Darktide

Darktide Launcher (if listed)

Allow them on both Private and Public networks.

Restart your PC.

Launch the game again.

If you use third-party antivirus software, check its firewall and network protection settings as well.

Fix 7: Flush DNS and Reset Network Cache

DNS or Windows network cache issues can prevent Darktide from connecting to backend services.

Steps

Open Command Prompt as Administrator.

Run:

ipconfig /flushdns

Then run:

netsh winsock reset

Restart your PC.

Open LagoFast.

Launch Steam and Darktide again.

This may help if the game previously worked but suddenly stopped connecting.

Fix 8: Test Another Network

In some cases, the problem may be related to your ISP or network route. If possible, test another connection.

Try:

A mobile hotspot

Another home network

A different ISP

A wired Ethernet connection instead of Wi-Fi

If Darktide works on one network but not another, the issue is likely route-related rather than a corrupted game installation.

Fix 9: Avoid Excessive Reconnect Attempts

When Darktide fails to enter the Mourningstar or join a mission, the game may offer a reconnect option. Repeated reconnect attempts can sometimes trap you in the same failed session.

Instead:

Cancel reconnect.

Close the game.

Restart Steam.

Wait 2–3 minutes.

Open LagoFast.

Launch Darktide again.

This gives the session time to reset.

Fix 10: For PS5 Players

Some PS5 players also report Error 2014, Error 2005, or backend connection issues while logging into Darktide.

Try the following:

Restart the game.

Restart the console.

Use a wired connection.

Restart your router.

Check PlayStation Network status.

Test another network if available.

Wait if the issue appears to be server-side.

If the same account works on another network, the problem is likely related to routing rather than the account itself.

Error Codes and Best Fixes

When It's Best to Wait

You may simply need to wait if:

Large numbers of players are reporting the same error at the same time.

Fatshark is already investigating connection issues.

The problem started immediately after a patch.

The game launches, but backend login always fails.

Error 2001, Error 2005, Error 2014, Error 3001, Error 3013, or Error 4001 appears across multiple networks.

In these situations, local troubleshooting may not provide an immediate solution. Keep the game updated and try again later.

Conclusion

Warhammer 40,000: Darktide login issues are usually not related to your PC's performance. If the game launches but you cannot log in, cannot load into the Mourningstar, or repeatedly encounter Error 2001, Error 2005, Error 2014, Error 3001, Error 3013, Error 4001, or Backend Error messages, the issue is most likely related to backend connectivity, network routing, authentication services, or temporary server-side instability.

Start with LagoFast, then restart Steam, verify your game files, and test a cleaner network route. If the servers are undergoing maintenance or investigation, wait for Fatshark to resolve the issue and keep your game fully updated.