How to set the command to be purchasable in the shop

This is my config for my shop.  When I try to buy the heli it says item not found.  I am using GUI Shop.  What am I doing wrong?

"personal Heli": {
"DisplayName": "call heli to you",
"CraftAsDisplayName": false,
"Shortname": "personal Heli",
"MakeBlueprint": false,
"EnableBuy": true,
"EnableSell": false,
"Image": "https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcQFMn4Po26t0yq5R66bSchYq5EyFtU8yQQDhA&usqp=CAU",
"SellPrice": 0.0,
"BuyPrice": 3000.0,
"BuyCooldown": 0,
"SellCooldown": 0,
"BuyQuantity": [],
"SellQuantity": [],
"KitName": null,
"Command": [
"personalheli.call $player.id",
"say The helicopter was called to player <color=#64ff64>$player.name</color>"

I'm having the same issue now. Did you ever figure it out?