"attempt to index upvalue 'Drops' (a nil value)" error when trying to drop item from static object?

Im trying to prepare a resource gethering mechanic from environment such as from tree. At 49th line i am getting the error that i mentioned at title.

Also is there easier way to make item drop? I just want that Log piece drop to ground so i can pick it to my inventory.

This is the ServerStorage part at Explorer: https://imgur.com/W8mHvXH

And this is what happens after progress bar completed: https://imgur.com/Hh8fjy9

local Player= game:GetService("Players").LocalPlayer
local Char = Player.Character
local Cursor = Player:GetMouse()
local Gather = true

local Items = {
	"Log";
	"Stone";
	}
local ServerStorage = game:GetService("ServerStorage")
local Drops = ServerStorage:FindFirstChild("Drops")

function ShowProgress(resource)
	if resource == 'Tree' then
		for i = 0,1, .01 do
			RG.BG.Bar.Progress.Size = UDim2.new(i,0,1,0)
			wait()
		end
	elseif resource == 'Rock' then
		for i = 0,1, .005 do
			RG.BG.Bar.Progress.Size = UDim2.new(i,0,1,0)
			wait()
		end
	end
end

Cursor.Button1Down:connect(function()
local Char = Player.Character or Player.CharacterAdded:Wait()

	if Cursor.Target ~= nil and Cursor.Target.Parent.Name == 'Tree' and  Gather == true then
		local Wood = Cursor.Target
		if (Wood.Position - Char.HumanoidRootPart.Position).magnitude <10 then
			Gather = false
			RG = Player.PlayerGui.Gathering
			RG.BG.Visible = true
			Char.Humanoid.WalkSpeed = 0
			ShowProgress('Tree')
			Char.Humanoid.WalkSpeed = 16

			for i,v in pairs(Wood.Parent.Leaves:GetChildren()) do
				if v:IsA('Part') then
					v.Anchored = false
				end
			end

			Wood:Destroy()
			--Drop Wood
			local source = Items[1]
				local Clone = Drops:FindFirstChild(source):Clone()
				Clone.Parent = workspace
				Clone.CFrame =Wood.Cframe * CFrame.new(0,2,0)
	
			

			RG.BG.Visible = false
			Gather = true
		end
	end
	if Cursor.Target ~= nil and Cursor.Target.Name == 'Rock' and  Gather == true then
		local Rock = Cursor.Target
		if (Rock.Position - Char.HumanoidRootPart.Position).magnitude <10 then
			Gather = false
			RG = Player.PlayerGui.Gathering
			RG.BG.Visible = true
			Char.Humanoid.WalkSpeed = 0
			ShowProgress('Rock')
			Char.Humanoid.WalkSpeed = 16

			Rock:Destroy()
			--Drop Stone
			RG.BG.Visible = false
			Gather = true
		end
	end

end)