Valheim world corrupted, missing or LOAD ERROR after 1.0 (fix)
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Last checked
November 1, 2026
A world that saved normally now shows as corrupted, is missing from the world list, or its seed shows LOAD ERROR, and restoring backups fails or brings back an older state.
Also appears as: valheim world corrupted, valheim world saves are gone, valheim world missing after logging in, valheim load error seed, valheim no suitable backup found, valheim corrupted save file, valheim steam cloud deleted my save, Steam FileWriteStreamWriteChunk() failed, valheim world not saving, valheim unable to save world object reference not set to an instance of an object
At least seven separate Steam Discussions threads between September 12 and September 25, 2026 describe this after the 1.0 update: worlds gone after a normal quit, worlds marked corrupted with backups that would not load, a world deleted again after being restored, and a base lost after using a portal. Several posters run Steam Cloud, one on a Steam Deck and one syncing two computers, while another rolled back a local save. None of those threads has a reply from Iron Gate, and its cause is unconfirmed. Iron Gate has acknowledged two save-related bugs in patch notes: Patch 1.0.14 (September 17) fixed a Steam Cloud state that could get stuck after a crash while saving, and fixed characters not saving correctly when you press Save on someone else's server. Iron Gate has not said those fixes cover the reports here.
Patch 1.0.17 (October 6) fixed "a rare bug that could erase all objects in parts of the world when one large world save chunk file was split into smaller ones." Iron Gate has not said this explains the reports above. One October thread ("The world has broken") reports a world save broken for the third time, with no reply from Iron Gate and no stated cause. Patch 1.0.21 (October 28) fixed Steam save caching getting out of sync when a world is changed outside the game; Iron Gate did not link it to these reports.
What to try
- 01Confirmed
Update to the newest patch (1.0.21)
Update to the newest patch (1.0.21 as of October 28, 2026). Its patch notes list a Steam fix for "an issue with save caching where file status can get out of sync when a world is modified outside of the game". Patch 1.0.17's notes say it "Fixed a rare bug that could erase all objects in parts of the world when one large world save chunk file was split into smaller ones." Iron Gate says a patch can take a few days to reach all platforms. Patch 1.0.14's notes list the Steam Cloud fix and the fix for characters not saving correctly when you press Save on someone else's server, both published at valheim.com/news/patch-1-0-14. Iron Gate has not said they cure worlds that are already corrupted.
- 02Reported
Delete leftover .stmp and .new files, then restore a working save (one report)
If Player.log shows "Steam FileWriteStreamWriteChunk() failed!" or "World save (5/5) FAILED", fully quit Steam (including the tray icon), open
Steam\userdata\<your Steam ID>\892970\remote, search for files ending.stmpor.new(mostly in the worlds subfolder) and delete them. Then start Valheim, open Manage Saves, Worlds, and restore an earlier save that works. The player in the October 11 thread "The game does not save the world after visiting the Ashlands" said this fixed it. - 03Reported
Open Manage Saves and try restoring an earlier backup (mixed results)
Open Manage Saves and try restoring an earlier backup of the world; Iron Gate's patch notes refer to backups restorable from that menu. Results in the threads are mixed: one player got a world back by rolling back to a backup about six hours old, while others in the same and two other threads say none of their backups would load.
- 04Reported
Turn off Steam Cloud and keep saves local (one report)
If you play on Steam, one player in the "World deleted upon logging back in" thread reports that turning Steam Cloud off for Valheim and keeping saves local stopped the losses for them, and says it only prevents new losses and does not recover a lost world. No one else confirmed it and Iron Gate has not commented on Steam Cloud as a cause.
- 05Confirmed
Report it through the bug form on valheim.com/support
Report it through the bug form on valheim.com/support. Iron Gate's pinned Steam post says that form is the only place it officially registers bugs, and lists known issues with priority and the version each was found in.
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