How do I troubleshoot the "World Save Failed" error in multiplayer?

The ''World Save Failed'' error in Valheim multiplayer can be frustrating, but it is often caused by issues with file permissions, corrupted save files, or server-client synchronization problems. This error typically occurs when the game is unable to save progress, which can lead to lost items, structures, or biome exploration data. Understanding the game''s save mechanics is crucial: Valheim saves world data and player data separately. World data includes terrain, structures, and biome changes, while player data includes inventory, skills, and location. Both are stored locally on the host''s machine or dedicated server.\n\nTo troubleshoot this issue, start by checking the file permissions for the save folder. On Windows, the save files are located in ''C:\Users\[YourUsername]\AppData\LocalLow\IronGate\Valheim\worlds''. Ensure that the folder and its contents are not set to ''Read-Only''. Right-click the folder, select ''Properties'', and uncheck the ''Read-Only'' box if it is enabled. This ensures the game has the necessary permissions to write save files.\n\nIf file permissions are not the issue, the next step is to verify the integrity of the save files. Corrupted save files can cause the ''World Save Failed'' error. Navigate to the save folder and look for files with the ''.fwl'' and ''.db'' extensions. These are your world and player data files. Make a backup of these files before proceeding. If you suspect corruption, try replacing the files with a backup from a previous session. If no backup is available, you may need to start a new world or character, though this is a last resort.\n\nAnother common cause of this error is server-client desynchronization. If you are playing on a dedicated server, ensure that the server software is up to date and compatible with your game version. For example, if you are using the Valheim Dedicated Server tool, check for updates on Steam. Additionally, ensure that all players have the same game version installed. Mismatched versions can lead to save errors and other multiplayer issues.\n\nIf you are hosting a game locally, try restarting both the game and your computer. Sometimes, temporary glitches can interfere with the save process. If the error persists, consider switching to a dedicated server or using a cloud-based hosting service. These options often provide more stable performance and better file management.\n\nFor players experiencing this error in specific biomes, such as the Mountains or Plains, it may be related to the complexity of the terrain or structures. Large builds, especially those involving terraforming or intricate designs, can strain the game''s save system. To mitigate this, avoid excessive terraforming and limit the number of objects in a single area. For example, if you are building a massive castle in the Black Forest, consider breaking it into smaller sections to reduce the load on the save system.\n\nFinally, ensure that your game is running on a system that meets or exceeds the minimum requirements. Low system resources, such as insufficient RAM or a slow hard drive, can contribute to save failures. Upgrading your hardware or switching to an SSD can improve performance and reduce the likelihood of errors.\n\nIn summary, the ''World Save Failed'' error can be resolved by checking file permissions, verifying save file integrity, ensuring server-client synchronization, and optimizing your game environment. By following these steps, you can minimize the risk of losing progress and enjoy a smoother multiplayer experience in Valheim.