How do I fix this issue with detecting IntValue changes?

I am having an error when I try to detect IntValue changes for a player.

local coinStore = game:GetService("DataStoreService"):GetDataStore("coinsv1")
local jumpAmountStore = game:GetService("DataStoreService"):GetDataStore("jumpv1")
local levelStore = game:GetService("DataStoreService"):GetDataStore("levelv1")

game.Players.PlayerAdded:Connect(function(p)
	local leaderstats = Instance.new("Folder", p)
	local coins = Instance.new("IntValue", leaderstats)
	local levels = Instance.new("IntValue", leaderstats)
	local jumpAmount = Instance.new("IntValue", leaderstats)
	leaderstats.Name = "leaderstats"
	coins.Name = "Coins"
	levels.Name = "Level"
	jumpAmount.Name = "Jumps"
	coins.Value = 0
	levels.Value = 1
	jumpAmount.Value = 0
	
	local jumpPower
	p.CharacterAdded:Connect(function(c)
		jumpPower = c.Humanoid.JumpPower
		c.Humanoid.JumpPower = jumpPower
	end)
	
	local data
	local datatwo
	local datathree
	local success, errormessage = pcall(function()
		data = coinStore:GetAsync(p.UserId.."-coins")
		datatwo = jumpAmountStore:GetAsync(p.UserId.."-jumps")
		datathree = levelStore:GetAsync(p.UserId.."-level")
	end)
	
	if success then
		coins.Value = data
		levels.Value = datathree
		jumpAmount.Value = datatwo
	else
		print(errormessage)
	end
	
	local recentcoins
	jumpAmount.Changed:Connect(function()
		if jumpAmount.Value == datatwo + 20 then
			levels.Value = levels.Value + 1
			recentcoins = jumpAmount.Value
		elseif jumpAmount.Value == recentcoins + 20 then
			levels.Value = levels.Value + 1
			recentcoins = jumpAmount.Value	
		end
	end)
	
	local recentjumps
	jumpAmount.Changed:Connect(function()
		if jumpAmount.Value == datatwo + 10 then
			local jumps = jumpAmount.Value / 10
			jumps = jumps + 50
			local cjump = p.Character.Humanoid.JumpPower
			cjump = jumps
			recentjumps = jumpAmount.Value
		elseif jumpAmount.Value == recentjumps + 10 then
			local jumps = jumpAmount.Value / 10
			jumps = jumps + 50
			local cjump = p.Character.Humanoid.JumpPower
			cjump = jumps
			recentjumps = jumpAmount.Value	
		end
	end)
end)

The error is at line 46 and 60. The error is attempt to perform arithmetic (add) on nil and number.

On line 41, you set recentcoins variable to nil . So on line 46 and 60, it tries to add 20 and 10 to a nil value, causing the error. Set recentcoins to 0 instead of just nil.

EDIT: It's also the case with line 52. Fix that too.