On this page 6 sections
At a glance
Main cause. The rest and what to do — below
The server was shut down during a world save.
Failed to load world data. World files may be corrupted. Shutting down.
The game prints the line in the log or error window only in English — search for it in English.
- The server was shut down during a world save.
- The world files are corrupted.
- Restore the world from a backup.
- Try the previous version: save the corrupted level.dat separately and rename level.dat_old to level.dat.
What does 'Failed to load world data' mean in Minecraft?
The server failed to read world files and shut down.
Why does it say 'Failed to load world data'?
Server was shut down during world save. World files are corrupted.
How to fix "Failed to load world data"?
Restore the world from a backup. Try the previous backup: save the corrupted level.dat separately and rename level.dat_old to level.dat.
- You need to agree to the EULA
- FAILED TO BIND TO PORT
- A single server tick took too long
- Failed to load datapacks
- Exception in server tick loop
- Cannot connect to the server
- Unknown server
- Timeout exceeded
- Connection lost
- End of stream
- Network protocol error
- Client incompatible
All errors Where Is the .minecraft Folder?
Error messages — directly from Minecraft 26.3 localization; causes and tips are provided in editorial notes.