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ARK Joining Failed Unknown Error | Basic Troubleshooting Steps

If you’re getting an “ARK joining failed unknown error” when trying to join a server in ARK: Survival Evolved (or ARK: Survival Ascended), it usually means the game client encountered a problem connecting to the server, but doesn’t provide a clear message.

Here are the most common causes and fixes:

✅ 1. Basic Troubleshooting Steps

  • Restart the Game: Fully close ARK and relaunch it.

  • Reboot Your PC/Console: This can clear up temporary issues.

  • Try Another Server: Helps determine if the issue is server-specific.

🔍 2. Common Causes & Fixes

🔧 Server Version Mismatch

  • Cause: Your game version doesn’t match the server’s.

  • Fix: Update your game via Steam/Epic, or ensure the server is updated.

🌐 Network or Firewall Issues

  • Cause: Firewall or NAT issues may block the connection.

  • Fix:

    • Temporarily disable your firewall or antivirus and try again.

    • Use a wired connection if possible.

    • Forward the following ports if you’re hosting:

      • UDP 7777, 7778, 27015

    • Make sure your NAT type is open or moderate.

🧼 Corrupted Game Files

  • Fix: On Steam

    1. Right-click ARK in Library → Properties

    2. Go to Installed Files

    3. Click “Verify integrity of game files”

🗂️ Mod Mismatch (Modded Servers)

  • Cause: Your mods are outdated or different from the server.

  • Fix:

    • Unsubscribe from the server’s mods.

    • Let ARK re-download them when you try joining.

    • Clear ARK’s mod cache:
      Go to \Steam\steamapps\common\ARK\ShooterGame\Content\Mods and delete unnecessary folders.

👤 Server Whitelist / Ban

  • Cause: You may be banned or not whitelisted on the server.

  • Fix: Contact the server admin or check server rules.

📛 Corrupted Save or Profile

  • Fix:

    • Navigate to \ARK\Saved or \ARK\ShooterGame\Saved\LocalProfiles and try renaming or deleting your .arkprofile.

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🧪 Advanced: Launch Options

You can try launching the game with specific options:

  1. In Steam → Right-click ARK → Properties → General → Launch Options

  2. Add:

    -USEALLAVAILABLECORES -sm4 -d3d10

    (Good for older PCs; can help performance and compatibility)

🆘 Still not working?

If the issue persists:

  • Let me know if you’re on PC, Xbox, or PlayStation

  • Mention whether it’s official, unofficial, or private-hosted

  • Share any mods involved

  • Tell me when the issue started (after update, new mod, etc.)