On this page 6 sections
At a glance
Main cause. The rest and what to do — below
A data pack made for a different game version.
Failed to load datapacks, can't proceed with server load. You can either fix your datapacks or reset to vanilla with --safeMode
The game prints the line in the log or error window only in English — search for it in English.
- A data pack made for a different game version.
- An error in the data pack files.
- Find the line with the error above this one — the file name is listed there.
- Remove the broken datapack from the world/datapacks folder or start the server with the --safeMode flag — only vanilla data.
What does 'Failed to load datapacks' mean in Minecraft?
The server failed to load world data packs and will not start.
Why does it say 'Failed to load datapacks'?
The data pack is made for a different game version. There is an error in the data pack files.
How to fix "Failed to load datapacks"?
Find the error line in the log above this one — the file name is listed there. Remove the broken datapack from the world/datapacks folder or start the server with the --safeMode flag — only with vanilla data.
- You need to agree to the EULA
- FAILED TO BIND TO PORT
- A single server tick took too long
- Exception in server tick loop
- Failed to load world data
- Cannot connect to the server
- Unknown server
- Timeout exceeded
- Connection lost
- End of stream
- Network protocol error
- Client incompatible
All errors Minecraft pack_format by Version
Error messages — directly from Minecraft 26.3 localization; causes and tips are provided in editorial notes.