Mod(s):
entity_model_features 2.4.4
entity_texture_features 6.2.14

Fabric loader 0.16.14
Minecraft 1.21.6

Java 21 (Microsoft, on Apple M1)

Crash description:

Minecraft crashes during startup with the following exception:

This seems to be related to one of the entity mods (EMF/ETF), possibly due to an invalid or placeholder block entity being registered.

Steps to reproduce:

Install EMF 2.4.4 and ETF 6.2.14 with the latest Fabric API on Minecraft 1.21.6.

Start Minecraft.

Crash occurs immediately during argument parsing / startup.

Mods installed:
(only relevant mods listed)

entity_model_features 2.4.4

entity_texture_features 6.2.14

fabric-api 0.128.1+1.21.6

How do I fix this problem?

crash-2025-06-30_11.56.44-client.txt

Hi there,

I was able to solve this problem by deleting the entity_texture_features.json and running minecraft again (as per #264). Hope this helps.

Hello. I managed to solve this issue by deleting all my files in order to have a fresh install of Minecraft. Another user, doggo-no, solved this issue by just deleting the config files. Hope that works

specifically this is caused by enabling the illegal paths option in the etf settings with certain mods that rely on illegal paths to fail to function normally, this happens enough with DUMMY that i'll hardcode an exception for it, but that is the root cause