The value sent through RemoteEvent is the tools name, but is somehow the players name?

This problem made the other person who tried to help me confused, including me.

I'm close to finishing this custom inventory, but this one and oddly confusing error just completely prevents me from completing this project. In line 2 of the Server Script, it prints out an error in the Output "BiIinear is not a valid member of Backpack" this is very confusing to me because the ItemNameValue, the value that is sent from Inventory Local Script to Server Script is the tools name, as determined from the Tool Local Script, is apparently the players name. I don't even know how it got this. I look on Client side, ItemNameValue is the tools name, and on Server side, the ItemNameValue is nil, this is obvious because this is inside a LocalPlayer, not even sure if I needed to add that bit. Here are the scripts.

Server Script:

game.ReplicatedStorage.EquipItem.OnServerEvent:Connect(function(player, item)
    player.Character.Humanoid:EquipTool(player.Backpack[item.Name])
end)

The variable of ItemNameValue is sent to the Server Script, so that way the script knows what to find. This is where the error occurs, on line 2.

Inventory Local Script:

wait(5)
local player = game.Players.LocalPlayer

--Equip
script.Parent.MouseButton1Click:Connect(function()
    if script.Parent.ItemNameValue.Value ~= '' then
        if player.Character:FindFirstChild(script.Parent.ItemNameValue.Value) then
            print("Already equipped!")
        else
            local item = script.Parent.ItemNameValue.Value
            game.ReplicatedStorage.EquipItem:FireServer(player, item)
        end
    else
    end
end)

The Inventory Local Script sends the ItemNameValue to the Server Script. Not the actual value, just the values value, if that makes sense.

Tool Local Script:

local player = game.Players.LocalPlayer.PlayerGui.Inventory.Frame.SlotFrame

if player.Slot01.ItemNameValue.Value == 'nil' then
    player.Slot01.Image = script.Parent.TextureId
    player.Slot01.ItemNameValue.Value = script.Parent.Name
    player.Slot01:WaitForChild("DescriptionValue").Value = script.Parent:WaitForChild("DescriptionValue").Value
    player.Slot01.Active = true
    script:Destroy()
else
--This code block repeats 20 times, because there's 20 slots total in the inventory. No need to repeat it 20 times as the slot number adds up.

This all starts from clicking an item in workspace, the tool that has the same name as the item gets cloned from Lighting, and gets put into the players Backpack. The tools localscript is disabled, and configures an available slot, and the ItemNameValue.

I hope this makes sense to you, and I hope I get an answer from this, because this pretty much ruins my custom inventory if not solved, I'd have to rewrite every script. Thanks in advance.