Trying to do stuff with leaderstats, but...?

Ok, so... I'm trying to make a system to make that when the player has triggered a prompt, it will add some points to the player and show up in the leaderstats, but... for some reason doesn't work... please help me... I would thank the person who help me with this stuff.

The prompt local script:

local Players = game:GetService("Players")
local player = Players.LocalPlayer

local prompt = script.Parent
local replicatedStorage = game:GetService("ReplicatedStorage")
local remotesEvents = replicatedStorage:WaitForChild("RemotesEvents")
local addDevPointsEvent = remotesEvents:WaitForChild("AddDevPoints")

prompt.Triggered:Connect(function()
	addDevPointsEvent:FireServer(player)
end)

And the main server script:

local replicatedStorage = game:GetService("ReplicatedStorage")
local remotesEvents = replicatedStorage:WaitForChild("RemotesEvents")
local addDevPointsEvent = remotesEvents:WaitForChild("AddDevPoints")

local function PlayerSetup(player)
	local leaderstats = Instance.new("Folder", player)
	leaderstats.Name = "leaderstats"
	
	local devPoints = Instance.new("IntValue", leaderstats)
	devPoints.Name = "DevPoints"
	devPoints.Value = 0
	
	local funds = Instance.new("IntValue", leaderstats)
	funds.Name = "Funds"
	funds.Value = 0
end

game.Players.PlayerAdded:Connect(PlayerSetup)

addDevPointsEvent.OnServerEvent:Connect(function(player)
	player.leaderstats.DevPoints.Value = player.leaderstats.DevPoints.Value + 2
end)

Not sure what you're trying to do 100% but, this is something similar. You can modify this to fit your needs.

game.Players.PlayerAdded:Connect(function(plr)
	local leaderstats = Instance.new("Folder")
	leaderstats.Name = "leaderstats"
	leaderstats.Parent = plr
	
	local devPoints = Instance.new("IntValue")
	devPoints.Name = "DevPoints"
	devPoints.Value = 0
	devPoints.Parent = leaderstats
	
	local funds = Instance.new("IntValue")
	funds.Name = "Funds"
	funds.Value = 0
	funds.Parent = leaderstats
end)

script.Parent.ProximityPrompt.Triggered:Connect(function(plr)
	plr:WaitForChild("leaderstats").DevPoints.Value += 2
end)

This is how I have it set up in workspace: https://gyazo.com/705f7421946e9b44acdaf09833e5c840

You can modify how long it takes to activate the prompt in the ProximityPrompt properties.