How do I fix the "World Not Found" error when trying to load a Valheim server?

The ''World Not Found'' error in Valheim is a common issue that occurs when trying to load a multiplayer server. This error typically happens when the game cannot locate the world file or when there is a mismatch between the server and client configurations. Understanding the game mechanics and following a systematic approach can help resolve this issue.\n\nFirst, ensure that the world file exists on the server. Valheim saves world data in specific directories depending on whether you are hosting a dedicated server or playing locally. For dedicated servers, the world files are stored in the ''worlds'' folder within the server''s installation directory. For local play, the files are located in the ''worlds_local'' folder under your Valheim user profile. Verify that the world file (with the .fwl and .db extensions) is present in the correct location.\n\nIf the world file is missing, it may have been accidentally deleted or corrupted. In such cases, restoring from a backup is the best solution. Valheim automatically creates backups of your world files, which can be found in the ''worlds'' or ''worlds_local'' folder with a .old extension. Rename the backup file to match the original world name and try loading the server again. If no backup is available, you may need to start a new world.\n\nAnother common cause of the ''World Not Found'' error is an incorrect world name or case sensitivity. Valheim world names are case-sensitive, so ensure that the name entered in the server configuration matches the exact name of the world file. For example, if your world file is named ''Midgard.fwl'', the server must reference it as ''Midgard'' and not ''midgard'' or ''MIDGARD''.\n\nFor dedicated servers, check the server configuration file (usually named ''start_headless_server.bat'' or ''start_server.bat''). Open the file in a text editor and verify that the ''-world'' parameter points to the correct world name. Additionally, ensure that the ''-name'' parameter matches the server name displayed in the Valheim server list. Any discrepancies here can prevent the server from loading the world.\n\nNetwork issues can also cause the ''World Not Found'' error. If you are hosting a server, ensure that your firewall or router is not blocking the necessary ports. Valheim uses UDP ports 2456-2458 by default. Forward these ports on your router and allow them through your firewall to ensure proper communication between the server and clients. If you are using a VPN, try disabling it to see if it resolves the issue.\n\nFor players joining a server, ensure that you are connecting to the correct IP address or server name. If the server is password-protected, double-check that you are entering the correct password. Sometimes, simply restarting the game or the server can resolve connectivity issues.\n\nIf the issue persists, consider reinstalling Valheim or updating to the latest version. Game updates often include bug fixes and improvements that can resolve such errors. Additionally, check the Valheim community forums or Discord for any known issues or patches related to the ''World Not Found'' error.\n\nIn summary, the ''World Not Found'' error in Valheim can be resolved by verifying the world file''s existence, ensuring correct naming and configuration, addressing network issues, and keeping the game updated. By following these steps, you can quickly get back to exploring the biomes, crafting powerful items, and surviving the challenges of Valheim with your fellow Vikings.