CurseForge · Minecraft mod
Error 404 Not Found (Horror Entity)
Adds an unknown entity into your world...
Quick answer
Which Error 404 Not Found (Horror Entity) release should I use?
Error 404 Not Found (Horror Entity) Error404-1.3.8-forge-1.20.1.jar targets 1.20.1 with Forge. The project page does not say whether this file belongs on the client, dedicated server, or both. All 1 required mods have matching files.
Where it goes
Is Error 404 Not Found (Horror Entity) required on the client, server, or both?
The project page does not say whether this file belongs on the client, dedicated server, or both.
The source does not explicitly classify this release as client-only or server-only.
What else does Error 404 Not Found (Horror Entity) Error404-1.3.8-forge-1.20.1.jar need?
Error404-1.3.8-forge-1.20.1.jar. Change the file and its required mods may change too.
Install GeckoLib first. We found matching files for this game-version and loader setup.
We only count dependency files that match this setup. A file for another loader does not fill the gap.
Before you install it
Add Error 404 Not Found (Horror Entity) without breaking your instance.
Built for Error 404 Not Found (Horror Entity) Error404-1.3.8-forge-1.20.1.jar. Pick another file and the loader, install side or required mods may change.
- 01
Stick to this file
Use Error404-1.3.8-forge-1.20.1.jar. It targets 1.20.1 with Forge; another release may have different loader, side or dependency requirements.
- 02
Bring the mods it needs
Install GeckoLib first. We found matching files for this game-version and loader setup.
- 03
Put it on the correct side
The project page does not say whether this file belongs on the client, dedicated server, or both.
- 04
Pick the file you checked
Use the “Get this file” button beside Error404-1.3.8-forge-1.20.1.jar. It opens that exact file at the source.
About this project
What does Error 404 Not Found (Horror Entity) add?

Recquires GECKOLIB!!11!!1
Your world started to act strange lately. Textures have been going missing, strange mobs have started spawning that look...weird. You've started to notice strange things in the sky, kind of like a portal.
Do you have what it takes to investigate these strange phenomenons?
The mod adds an entity that stalks, attacks and even crashes the player. (Can be toggled on and off using the config) It corrupts your world, removing textures from nearby blocks and extinguishing your torches. Explore the structures the mod has to offer and put an end to his reign.
If you find any bugs, please leave a comment or message me directly on Curseforge!

FAQ:
- Does it corrupt my world/damage my device?
No, it doesn't. "Only corrupting" it can do is by replacing blocks with error blocks in your world and sometimes kicking you out of your own world. Other than that, it is completely safe to play!
- How can I stop it from converting logs into the error block or disable it from kicking me out of my world?
Type /openconfig to open the configuration gui. There you can disable/enable it from kicking you or converting logs into other blocks.
- Is it compatible with multiplayer?
Yes! Feel free to play with your friends, family, parents, grandparents, etc. You are GUARANTEED to have a great time!
Models/Animations/Coding - RoLuky (Me!!)
Do not port to bedrock! I will strike you down and let the council decide your fate.
Commands:
/OpenConfig- Opens the mod's config gui
Project description from CurseForge.
Pick your setup
Error 404 Not Found (Horror Entity) by Minecraft version and loader
Choose the version and loader you play, then open the matching release.
1.20.1
1 loader buildCheck the dependencies, then try the file in a copied instance before changing a world you care about.
Recent files
Error 404 Not Found (Horror Entity) versions and loaders
Error404-1.3.8-forge-1.20.1.jar
5 May 2025
Error404-1.3.7-forge-1.20.1.jar
29 Apr 2025
Error404-1.3.6-forge-1.20.1.jar
21 Apr 2025
Error404-1.3.5-forge-1.20.1.jar
4 Apr 2025
Error404-1.3.4-forge-1.20.1.jar
1 Apr 2025
Error404-1.3.3-forge-1.20.1.jar
1 Apr 2025
Error404-1.3.2-forge-1.20.1.jar
Error404-1.3.2.2-forge-1.20.1.jar
29 Mar 2025
Error404-1.3.1-forge-1.20.1.jar
15 Mar 2025
Error404-1.3.0-forge-1.20.1.jar
24 Feb 2025
Error404-1.2.3-forge-1.20.1.jar
21 Feb 2025
Error404-1.2.2-forge-1.20.1.jar
error-1.2.2-forge-1.20.1.jar
30 Nov 2024
Error404-1.2.1-forge-1.20.1.jar
26 Nov 2024
Looking for an older file? The official CurseForge project page is in Resources.