New World “Unknown File Version” Error Fix

If you encounter an "Unknown File Version" error when trying to run the New World game, a potential fix is to validate your game files. This is how you can do it:

• Restart your computer and launch Steam
• Go to the Library section. Right-click on the New World game. Select Properties from the menu.
• Select the Local files tab and click the "Verify integrity of game files..." button.

After this, you will have to wait a little. The Steam client will check all the game files and will re-download them if some of them are broken. This fix should help.

Here is an official Steam Guide:
https://support.steampowered.com/kb_article.php?ref=2037-QEUH-3335

If the fix doesn't help, you may try to re-install the game entirely. Reinstallation will take much more time, but you will definitely get rid of this error.