warningServer ErrorsAffects: 1.13+
How to Fix Data Packs Not Loading
Fix Data Packs Not Loading by verifying pack format, JSON syntax, and correct placement in the datapacks folder.
Quick Fix
Check that data packs are in world/datapacks/ and have a valid pack.mcmeta with the correct pack_format.
Error Message
Failed to load datapacks, can't proceed with server loadHow to Fix
1
Verify data packs are in <world>/datapacks/ folder
2
Check pack.mcmeta for correct pack_format (26 for 1.21)
3
Validate JSON files for syntax errors
4
Start server with --safeMode to skip problematic data packs
5
Remove conflicting data packs one at a time
Common Causes
- Data pack format version incompatible with server version
- Syntax errors in JSON files within the data pack
- Missing or malformed pack.mcmeta
- Data pack placed in wrong directory
Diagnostic Steps
- Check the server log for specific data pack errors
- Verify pack.mcmeta format
- Validate JSON files
- Try --safeMode to start without data packs
FAQ
What is the correct pack_format for 1.21?
Pack format 26 for 1.21. Check the Minecraft Wiki for the format number matching your version.