How to fix Blue Archive error 10009

Blue Archive error 10009   (often accompanied by the message  “Game table was not loaded”  or authorization issues) usually occurs because your computer or network is unable to properly communicate with the Nexon servers.

Method #1: Editing the hosts file

This method helps if your ISP or DNS server can’t find the path to Nexon’s authorization servers. We’ll manually point your computer to the correct IP addresses.

1. Run Notepad as administrator, select File → Open and go to this path:C:\Windows\System32\drivers\etc\

2. In the file open window (bottom right), change “Text documents (*.txt)” to “All files” to see the  hosts file . Open it.

3. Add the following lines to the very end of the file

43.202.78.169 public.api.nexon.com
3.34.32.127 public.api.nexon.com
43.201.213.30 public.api.nexon.com

Click File →  Save  and restart the game.

Method #2: Reset Settings on the Title Screen

Sometimes the error is caused by corrupted local settings that the game tries to read when launching.

1. Launch Blue Archive and wait until the main screen appears (where it says “Touch to Start”).
2. In the lower left corner, find the  Menu button  (icon with three stripes).
3. Click  Reset Game Settings  .
4. Confirm the action and restart the game.

Method #3: Clearing the cache

If the resource files downloaded incorrectly, the game tables will not load.

1. On the same home screen, press  Menu .
2. Select  Clear  Cache.
3. The game will delete the temporary data and download it again (you will need to re-download the data).

Method #4: Checking Integrity in Steam (for PC)

If you are playing through Steam, it is possible that some of the game files were blocked by your antivirus or were not downloaded completely.

1. In your Steam library, right-click on  Blue Archive .
2. Select  Properties  →  Installed Files .
3. Click  Verify integrity of game files .

Method #5: Network and VPN Issues

Nexon Game Security (NGS) is sensitive to connection quality and regional blocks.

• VPN:  If the error persists, try running the game through a VPN (recommended regions: Japan, Korea, or the US). This will help if the issue is with your ISP’s routing.
• Mobile hotspot:  Try sharing your internet connection from your phone and launching the game. If everything works over the mobile network, the issue lies with your router or ISP settings.
• DNS:  Try changing DNS in Windows settings to Google (8.8.8.8 and 8.8.4.4).