How to fix elseif statement not running?

I've made an if statement with an elseif statement in a while wait() loop. But only the if statement run because whenever the if statement returns false but the elseif statement returns true it doesn't run the function in the scope of the elseif statement. Here's the code. Also the function is called whenever the player presses E while near the object I set it to.

function RequestGemConvert()
	local Coins = 0
	local MaximumCoins = game.ReplicatedStorage.ConvertGems:InvokeServer(0,false) -- so we would only invoke it once
	
	script.Parent.GemConverter.Open.Value = true
	
	script.Parent.GemConverter.Background:TweenPosition(UDim2.new(0.5,0,0.5,0),"Out","Quint",0.5,true)
	
	script.Parent.GemConverter.Background.Add.MouseButton1Click:Connect(function()
		Coins = Coins + 1			
	end)
	
	script.Parent.GemConverter.Background.Subtract.MouseButton1Click:Connect(function()
		Coins = Coins - 1
	end)
	
	script.Parent.GemConverter.Background.Max.MouseButton1Click:Connect(function()
		Coins = MaximumCoins
	end)
	
	script.Parent.GemConverter.Background.Min.MouseButton1Click:Connect(function()
		Coins = 0
	end)
	
	script.Parent.GemConverter.Background.Convert.MouseButton1Click:Connect(function()
		if game.Players.LocalPlayer:WaitForChild("Leaderstats").Coins.Value == 0 or Coins < 5 then
			module:SendNotification("Error!","You only gave the machine a little amount of Coins! You need to spend 5 Coins or more in this machine to get any amount of Gems!")
		else
			game.ReplicatedStorage.ConvertGems:InvokeServer(Coins,true)
			script.Parent.GemConverter.Background:TweenPosition(UDim2.new(0.5,0,1.5,0),"In","Quint",0.5,true)
			module:SendNotification("Awesome!","Successfully converted your coins to Gems!")
			script.Parent.GemConverter.Open.Value = false
		end
	end)
	
	script.Parent.GemConverter.Background.Exit.MouseButton1Click:Connect(function()
		script.Parent.GemConverter.Background:TweenPosition(UDim2.new(0.5,0,1.5,0),"In","Quint",0.5,true)
		script.Parent.GemConverter.Open.Value = false
		Coins = 0
	end)
	
	
	while wait() do
		script.Parent.GemConverter.Background.Coins.TextLabel.Text = module:RequestPlaceValue(Coins)
		script.Parent.GemConverter.Background.Gems.TextLabel.Text = module:RequestPlaceValue(math.floor(Coins / 5))
		
		if Coins == 0 then -- Working if statement
			script.Parent.GemConverter.Background.Subtract.Visible = false
			script.Parent.GemConverter.Background.Add.Visible = true
		elseif Coins == game.Players.LocalPlayer:WaitForChild("Leaderstats").Coins.Value then -- not working elseif statement
			script.Parent.GemConverter.Background.Add.Visible = false
			script.Parent.GemConverter.Background.Subtract.Visible = true
		else
			script.Parent.GemConverter.Background.Add.Visible = true
			script.Parent.GemConverter.Background.Subtract.Visible = true
			script.Parent.GemConverter.Background.Max.Visible = true
			script.Parent.GemConverter.Background.Min.Visible = true			
		end
		
		if script.Parent.GemConverter.Open.Value == false then
			break
		end
	end
end

The problem might be because of the case-sensitive, it's usually leaderstats not Leaderstats

Leaderboards

so try using leaderstats not Leaderstats

Try "leaderstats" instead of "Leaderstats"!

Hey! Instead of making minus and plus button to add or subtract the number variable why not just add some slider GUI so the player would be less frustrated when they want to change the number variable?