advancement not working

Hello, I am trying to make my first data pack alone, and I got the error " Couldn't parse data file 'tutorial:tutorial/root' from 'tutorial:advancement/tutorial/root.json': DataResult.Error['No key id in MapLike[{"item":"minecraft:bee_spawn_egg"}]': ah[parent=Optional.empty, display=Optional.empty, rewards=am[experience=0, loot=[], recipes=[], function=Optional.empty], criteria={root=aq[trigger=dd@17f03114, triggerInstance=a[player=Optional.empty, entityPredicate=Optional.empty, killingBlow=Optional.empty]]}, requirements=[[root]], sendsTelemetryEvent=false, name=Optional.empty]]" Can somebody help me figure out what I have wrong? thank you, and here is my code below. { "display": { "icon": { "id": "minecraft:bee_spawn_egg", "components": {} }, "title": "Heads", "description": "No head?", "background": "ameythest_block", "frame": "task", "show_toast": true, "announce_to_chat": true, "hidden": false }, "criteria": { "root": { "trigger": "minecraft:player_killed_entity" } } }