advancement not working (player_killed_entity)

I recently saw a video of how to make an advancement like this and mine has the condition of kill a zombie, but it doesnt work. I tried to grant me the custom advancement but, guess what, I doesnt appear🙁 data//advancments/test/root.json: { "disaplay": { "icon": { "item": "zombie_head", "nbt": "{Enchantments:[{lvl:1s, id:\"minecraft:mending\"}]}" }, "title": { "text": "Conqueror of the Canibbal" }, "description": { "text": "Kill a caniball" }, "frame": "task", "show_toast": true, "announce_to_chat": true, "hidden": false, "background": "minecraft:textures/block/moss_block.png" }, "criteria": { "killed_zombie": { "trigger": "minecraft:player_killed_entity", "conditions": { "entity": { "type": "minecraft:zombie" }, "killing_blow": {} } }, "requirements": [ ["killed_zombie"] ], "rewards": { "experience": 3 } } }