Error with root advancement? I’m not sure how to read this error message.

here is my root.json:
{   "display": {     "icon": {       "id": "minecraft:breeze_spawn_egg",       "count": 1     },     "title": "OneMace",     "description": "Makes the mace only craftable once",     "background": "minecraft:block/tuff_bricks",     "frame": "task",     "show_toast": false,     "announce_to_chat": false,     "hidden": false   },   "criteria": {     "name": {       "trigger": "minecraft:tick"     }   },   "requirements": [     [     ""     ]   ] }