Proven Fixes For Lost Ark Error 10010

Lost Ark Error 10010 triggers server authentication failures; solutions include network adjustments, VPN use, and account unlinking amid unclear developer communication.

Lost Ark Error 10010 occurs when attempting to log into the game’s servers, resulting in a “Server Authentication Failed” prompt and preventing online play.

Various factors can trigger this issue, such as internet problems, server issues, or missing game files. To address this error, we’ll provide effective solutions to help you return to playing the game with others.

Key Highlights

Lost Ark Error 10010 Fixes:

  1. Disable IPv6 on Your Windows PC
  2. Switch Up Your DNS Settings
  3. Utilize the Command Prompt for Network Troubleshooting
  4. Whitelist Lost Ark In Antivirus
  5. Unlink Your Steam Account on Twitch and Amazon Games
  6. Change the Title’s Multiplayer Region
  7. See If Another Steam Account Does the Trick

Disable IPv6 on Your Windows PC

The IPv6 internet protocol can sometimes be troublesome for games connecting to servers. So what you can do is try disabling it so your PC switches to IPv4.

The following steps will guide you on how to disable IPv6 on your Windows PC.

  1. Open the “Settings” app on your Windows device.
Opening Settings on Windows 10
Opening Settings on Windows 10

2. Go to “Network and Internet.”

Clicking on Network and Internet
Clicking on Network and Internet

3. Click “Change adapter options” and select your current connection type (e.g., Wi-Fi, LAN, Ethernet).

Opening the Properties of the Network Connection
Opening the Properties of the Network Connection

4. Right-click on your chosen connection and choose “Properties.”

Unchecking the IPv6 on the Windows 10 PC
Unchecking the IPv6 on the Windows 10 PC

In the network connection properties window, navigate to the “Networking” tab. Look for “Internet Protocol Version 6 (IPv6).” Uncheck the box next to it, and click “OK” to save the changes.

Switch Up Your DNS Settings

Switching up DNS settings can also be a method to solve Lost Ark Error 10010. By altering your DNS (Domain Name System) settings, particularly by changing the DNS server addresses to alternatives like “” and “,” you aim to enhance network connectivity and resolve authentication issues when attempting to access Lost Ark’s servers.

This adjustment might help mitigate server authentication failures, enabling smoother gameplay by potentially circumventing connectivity obstacles linked to default DNS settings.

Run a Series of Network Troubleshooting Steps 

All you have to do to employ this potential solution to the issue is follow the steps below. Make sure to replicate the provided guidelines verbatim for the best results. 

  1. Open Command Prompt as an administrator. You can do this via the Windows Start menu or from the Taskbar if it’s pinned there.
Running the Command Prompt as an Administrator
Running the Command Prompt as an Administrator

2. Run these commands one by one:

ipconfig /flushdns
Flushing the DNS Resolver Cache
Flushing the DNS Resolver Cache

3. Next, register a new DNS by running the following command:

ipconfig /registerdns
Lost Ark error 10010
Registering a New DNS

4. Renew your IP address by running the following command.

ipconfig /renew
Renewing the IP Address
Renewing the IP Address

5. To reset the Winsock catalog, which can help improve network connections, use the following command:

netsh winsock reset
Lost Ark error 10010
Performing a Winsock Reset

6. Try launching Lost Ark again to check if the issue is resolved.

Temporarily Disable Antivirus Software 

Temporarily disabling antivirus software can also solve Lost Ark Error 10010. Turning off your antivirus program, especially Kaspersky, will prevent it from restricting your game’s access to the network. Hence, you may address issues related to server authentication failure in Lost Ark.

However, it’s crucial to remember that this step is temporary, and re-enabling your antivirus after testing the game is essential to maintain system security. Instead, I recommend whitelisting your game’s installation folder.

Unlink Your Steam Account on Twitch and Amazon Games

This often happens with other games when you link your Steam account to Twitch or any other 3rd-party platform. This is a rare case scenario where the game doesn’t start up, or Steam doesn’t authorize it to connect to servers. So a simply unlinking it could solve the issue for you.

  1. Start by visiting the official Amazon Games website.
  2. Sign in to your Amazon Games account with the same credentials you use for Lost Ark, which is linked to your Steam account.
  3. Once you’re logged in > locate the “Unlink account” button. You can usually find this button in the top-right corner of the webpage.
  4. Click on the “Unlink account” button.
  5. After clicking the button > you’ll be prompted to confirm your decision. Confirm the unlinking process by clicking “Confirm.”
Lost Ark error 10010
Clicking on “Unlink account”

In addition, the “NOTE” in the prompt reads, “This action will also unlink the Twitch account you used to claim Twitch Drops for New World, Lost Ark, and other titles published by Amazon Gameson Steam.”  

Lost Ark error 10010
Confirming the Selection

Therefore, we no longer have to go to Twitch separately to unlink our account from there. However, you can do this from the official Twitch Drops section of the Lost Ark website.  

After unlinking your accounts, launch the game and see if you can finally start playing online. If the game works fine, try linking it back up and then test again. 

Change the Title’s Multiplayer Region 

Regional problems happen commonly as your region’s servers might have scheduled maintenance or some issues. You can freely switch to other region servers to avoid facing this issue.

Changing Lost Ark Region Setting:

  1. Open “File Explorer.”
  2. Search for the “UserOption” file or navigate to it manually:
    • Go to “steamapps” > “common” > “Lost Ark” > “EFGame” > “Config.”
  3. Open “UserOption” file.
  4. Find <Setting name="Region" type="int" value="0" /> and change the “value”:
    • “0” for “KOR” (Korean).
    • “1” for “JPN” (Japanese).
    • “2” for “EN” (English).
  5. Save the file and launch Lost Ark.

Change the “CE” portion of the entry to “WE,” “WA,” “CE,” or “SA,” depending on where you live, and save the file using the toolbar at the top. 

Lost Ark error 10010
Configuring the Region of Lost Ark

My Thoughts

Lost Ark’s Error 10010 disrupts server access, causing a “Server Authentication Failed” prompt and affecting many players. This issue is quite widespread, as I’ve seen reports on Steam, Nvidia forums, Reddit, and Amazon Game forums.

Thankfully due to the nature of the issue, the developers responded quickly on Twitter and announced a patch that would address this issue. Hopefully, the error will have been fixed by now. 

However, if you’re still facing the issue, the fixes I suggest above will definitely be of use to you in resolve it. 

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Haider Khan is our error guides writer who loves to tinker around with operating systems and game files to find practical solutions to video game issues. He then crafts easy-to-follow error fix guides based on his findings. He’s also a Battlefield veteran who likes to rack up some Ws in his spare time. Learn some more about his gaming journey on his Steam profile. Experience: 3+ Years || Education: Bachelor's in Journalism || Successfully Troubleshot Over 200 Games || Mainly Covers Error Fix & Game Settings 

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