criticalMod ErrorsAffects: 1.20.2+ NeoForge
How to Fix NeoForge Crash on Startup
Fix NeoForge Crash on Startup by using NeoForge-specific mod versions instead of legacy Forge mods.
Quick Fix
Ensure all mods are specifically built for NeoForge, not legacy Forge. Check each mod's download page.
Error Message
NeoForge has detected errors during mod loadingHow to Fix
1
Download NeoForge-specific versions of all mods
2
Update NeoForge to the latest version
3
Remove any legacy Forge mods
4
Check mod pages for NeoForge compatibility notes
Common Causes
- Mod built for Forge instead of NeoForge
- Missing NeoForge API dependencies
- NeoForge version mismatch
- Mod using removed or changed Forge APIs
Diagnostic Steps
- Read the error list in the crash dialog
- Check each flagged mod for a NeoForge version
- Replace Forge versions with NeoForge versions
- Restart
FAQ
Can I use Forge mods with NeoForge?
Some older NeoForge versions have partial Forge compatibility, but for 1.21+ you need mods built specifically for NeoForge.