Advancement not appearing

Im trying to make a root andvancement that you automatically get when you join but the is doesent seem to be working { "display": { "icon": { "id": "minecraft:iron_sword" }, "title": "Welcome Murder Mystery", "description": "Good Luck.", "background": "minecraft:red_concrete", "frame": "task", "show_toast": true, "announce_to_chat": false, "hidden": false }, "criteria": { "Tick": { "trigger": "minecraft:tick" } }, "requirements": [ [ "Tick" ] ] }