ModsJava
NaNFix
Remove the NaN entity. Free Minecraft Java mod for 1.21, 1.21.1, 1.21.2.
I don't know my version or loader
Open the Minecraft launcher and look at the profile you play on — it names both, like fabric-loader-1.21.4. The version also shows in the bottom-right corner of the game's main menu.
No loader in the profile name? Then it's plain Minecraft, and these mods won't run — you need Fabric or NeoForge installed first.
When the minecraft summon a NaN entity.
The server logs like this:
This mod will remove the NaN entity to avoid huge log files.
How the mod works:
When a entity was set to NaN rotation, the mod will remove the errored entity.
Attention: This may result in the deletion of some of the entities in your save.
Verified by MCModsHub
- Ships as nanfix-neoforge-1.21.1-1.0.0.jar — drop this file into the mods folder
- Download size: 7 KB
- Download link checked 5 Sept 2026 — working
These come from our own check of the pack file, not from the source page.