Location:
Chapter 17 - Quest "Will you this for me? - #1694 - Step 3

You need to delete the majority of that step, due to the ritual of peaceful souls does not exist(Its a addon mod)

Exact fix:
Maybe say something like : Step 3. You have 2 options here: Use a couple Powered Spawners to spawn passive animals in the chunk; or use cursed earth to spawn hostile mobs.

Changed the explanation to what you've suggested.