https://mclo.gs/QQEqaae 1.21.1 neoforge

Which spawner? vanilla? MGU? the log doesn't contain anything useful, its a error... while trying to make a crash report?

Whenever the evoker spawn from the spawner and get killed by the mobgrinder, it will trigger this error

so far i havnt been able to reproduce it in single or multiplayer as well.

Do you have the full crash log?

I converted a regular spawner into an Evoker spawner using a spawn egg obtained from Nutritious Chicken Feed, which comes from the Mob Grinding Utils mod. The spawner was fully upgraded with the Apothic Spawner mod, featuring a minimum spawn delay of 20 ticks, a maximum spawn delay of 20 ticks, maximum spawn count, and a spawn range of 1.

The mob farm setup, as shown in the pictures, pushes the spawned mobs into the grinder. The error occurred when the Evoker was pushed into the grinder. (Not sure if the spawned vex caused the error or the evoker itself)

Are there piglin in that spawn pit? cause the error is pointing me at a mod called piglinproliferation

It looks like that mod has had this same crash before as well, guess it broke again?
seymourimadeit/Piglin-Proliferation#15

its not available, since its given by neruina:

this could help maybe?
https://mclo.gs/RTaDcbq

seems like it again, ima make an issue there too and gonna link this issue

im pulling the mod into my dev environment so i can try to breakpoint the exception.

So far still havnt been able to reproduce it, perhaps its rare?

i dont really know

Is it happening often? once and awhile? i spawned like 200 piglin brutes and evokers into a grinder and it never flinched.

Here's the list of the mob inside the spawning room:
concussion creeper(ender zoology), pillager, evoker, warper(piglet structure), the redstone(piglet structure), iron golem, piglin, blaze
Spawner upgrades: 20 min/max spawn tick, range of 1, max ghast tear upgrade

I still cannot reproduce this even with the piglin mod present.

dont rlly know then