'Attempt to index boolean with 'Cost"?

I am making a shop for my simulator and I have this error: ' attempt to index boolean with 'Cost' '

local RS = game:GetService("ReplicatedStorage")
local thisData = RS:WaitForChild('GetCacheData'):InvokeServer('Foods', script.Parent.Name)

script.Parent.MouseButton1Click:Connect(function()
    assert(thisData ~= nil, "NO DATA FOUND FOR "..script.Parent.Name)

    script.Parent.Parent.SelectedItemFrame.Name.Text = thisData.Name --This is the line with the error
    script.Parent.Parent.SelectedItemFrame.Price.Text = "$"..thisData.Cost -- This one also gives the error
end)

This is the second script:

local remote = game:GetService("ReplicatedStorage"):WaitForChild('GetCacheData')
local storage = game:GetService("ServerStorage")
local Cache = require(storage:WaitForChild('CacheData'))
local timeout = 5
local logged = {}

remote.OnServerInvoke = function(player, kind, ...)
    if not player or not kind then return false end
    if tick()-(logged[player.UserId] or 0) < timeout then return false end
    local thisCache = Cache[kind]

    if #{...} < 1 then return thisCache end
    for _, k in pairs({...}) do
        thisCache = thisCache[k] or thisCache
    end

    logged[player.UserId] = tick()
    return thisCache
end

And this is the script with all of the data:

return {
    Foods = {
        Apple = {
            Name = 'Apple',
            id = 1,
            Weight = 5,
            Cost = 0,
        },
        Burger = {
            Name = 'Burger',
            id = 4,
            Weight = 500,
            Cost = 2000,
        },
        ChocolateBar = {
            Name = 'ChocolateBar',
            id = 2,
            Weight = 20,
            Cost = 150,
        },
        Fries = {
            Name = 'Fries',
            id = 6,
            Weight = 3000,
            Cost = 25000,
        },
        Pizza = {
            Name = 'Pizza',
            id = 5,
            Weight = 1250,
            Cost = 10000,
        },
        Sandwich = {
            Name = 'Sandwich',
            id = 3,
            Weight = 35,
            Cost = 400,
        },
        Steak = {
            Name = 'Steak',
            id = 8,
            Weight = 8000,
            Cost = 2000000,
        },
        Taco = {
            Name = 'Taco',
            id = 7,
            Weight = 4500,
            Cost = 60000,
        },
    },
    Bags = {
        SmallPicnicBack = {
            Name = "Small Picnic Back",
            id = 9,
            Capacity = 15,
            Cost = 0,
        },
        RegularBag = {
            Name = "Regular Bag",
            id = 10,
            Capacity = 30,
            Cost = 100,
        },
        LargeBag = {
            Name = "Large Bag",
            id = 11,
            Capacity = 50,
            Cost = 275,
        },
        Backpack = {
            Name = "Backpack",
            id = 12,
            Capacity = 80,
            Cost = 500,
        },
        Suitcase = {
            Name = "Suitcase",
            id = 13,
            Capacity = 130,
            Cost = 925,
        }
    },
}