warningCrash ReportsAffects: 1.12+
How to Fix Advancement Loading Crash
Fix Advancement Loading Crash by fixing data pack JSON or removing broken advancement files.
Quick Fix
Remove the data pack with broken advancements, or delete the world/advancements/ folder.
Error Message
Error loading advancements / Failed to parse advancementHow to Fix
1
Check the log for the failing advancement
2
Fix or remove the data pack
3
Delete world/advancements/<player>.json for affected players
4
Update mods that add custom advancements
Common Causes
- Data pack with invalid advancement JSON
- Advancement referencing items/blocks from removed mods
- Circular advancement dependencies
Diagnostic Steps
- Read the log for the specific advancement
- Fix or remove the source data pack
- Clear player advancement data if needed
- Restart
FAQ
Will clearing advancements affect gameplay?
Players will lose advancement progress but not items or world data. Advancements can be re-earned.