[28May2021 03:23:27.699] [Worker-Main-8/WARN] [net.minecraft.client.audio.SoundHandler/]: File goblintraders:sounds/entity/goblin_trader/annoyed_grunt1.ogg does not exist, cannot add it to event goblintraders:entity.goblin_trader.annoyed_grunt

annoyed_grunt.ogg is there, and annoyed_grunt2.ogg

guessing it is trying to call annoyed_grunt.ogg but the 1 was accidentally typed. Alternatively, just rename annoyed_grunt.ogg to annoyed_grunt1.ogg if nothing else calls that sound file.