infoMod ErrorsAffects: All modded versions
How to Fix JEI / REI Loading Errors
Fix JEI/REI Loading Errors by updating to the latest version and clearing the recipe cache.
Quick Fix
Update JEI/REI to the latest version for your Minecraft and mod loader version.
Error Message
JEI encountered an error / REI failed to loadHow to Fix
1
Update JEI/REI to the latest compatible version
2
Increase RAM allocation if using a large modpack
3
Check if a specific mod is providing invalid recipes (check logs)
4
Clear the JEI/REI cache: delete .minecraft/jei/ or .minecraft/rei/ folder
Common Causes
- JEI/REI version not matching Minecraft version
- Another mod providing invalid recipes
- Memory issue with large modpacks
Diagnostic Steps
- Update JEI or REI
- Delete the jei/ or rei/ cache folder in .minecraft/
- Increase RAM if needed
- Restart
FAQ
JEI or REI?
JEI is for Forge/NeoForge. REI has Fabric, Forge, and NeoForge versions. Both show recipes and item info in-game.