PreloadAsync is not working, am I using it properly?

Well, I've created an inventory GUI, everything is done but when I test it, the decals failed to preload. Anyone got any idea on what happened?

Here's the script itself:

wait(1)
local rep = game:GetService("ReplicatedStorage")
local remote = rep.Remotes:WaitForChild("GetPlayerItemInfoCTC")
local remote2 = rep.Remotes:WaitForChild("SendPlayerItemInfoEvent")
local remote3 = rep.Remotes:WaitForChild("InventoryControlEvent")
local remote4 = rep.Remotes:WaitForChild("CloseAllGuisCTC")
local frame = script.Parent
local gui = frame.Parent
local panelHolder = frame:FindFirstChild("BlankHolder")
local plr = game.Players.LocalPlayer
local itemModule = require(rep.Modules.ItemLibrary)
local contentProvider = game:GetService("ContentProvider")

local quanityList = {}

local itemInfo = {}

local function checkHorizontalNumber(id, line)
    if line == 1 then
        return id
    else
        local preOperator = line - 1
        local operator = 4 * preOperator
        local formula = id - operator
        return formula
    end
end

local itemInfo = remote:InvokeServer()

wait(1)
for i, v in pairs(itemInfo) do
    print(i,v)
    local lineNumber = math.ceil(i / 4)
    local HorizontalId = checkHorizontalNumber(i, 1)
    local additional = HorizontalId - 1
    local additional2 = lineNumber - 1
    local Coordinate = UDim2.new(0, 135 * additional, 0, 135 * additional2)
    local obtainedItemName, obtainedItemInfo = itemModule.GetItem(v)
    wait(0.25)
    if obtainedItemInfo then
        local itemTier = itemModule.TierValue(v)
        local targetPanel = panelHolder:FindFirstChild("Panel"..i)
        if targetPanel then
            targetPanel.ToolName.Text = obtainedItemName
            targetPanel.ItemImage.Image = "rbxassetid://"..obtainedItemInfo.image
            wait()
            contentProvider:PreloadAsync({targetPanel.ItemImage})
        else
            local newPanel = panelHolder.Panel1:Clone()
            newPanel.Name = "Panel"..i
            newPanel.Parent = panelHolder
            newPanel.ToolName.Text = obtainedItemName
            newPanel.Position = Coordinate
            newPanel.ItemImage.Image = "rbxassetid://"..obtainedItemInfo.image
            wait()
            contentProvider:PreloadAsync({newPanel.ItemImage})
        end
    end
end

The item library is just a module script that stores all information for all gears.

Here's the output: 1 Wood Club Starting Module 20:50:36.140 - ContentProvider:PreloadAsync() failed for rbxassetid://2331348483 2 Alpha Sword Starting Module 20:50:36.487 - ContentProvider:PreloadAsync() failed for rbxassetid://2331348483

The game is a group game, and the decal's owner is the group. This should've worked properly but it didn't, if you can find any problem please tell me, all help appreciated.