problem with DataStore '403: Cannot write to DataStore from studio if API access is not enabled'?

i don't know what i did wrong to get this output '403: Cannot write to DataStore from studio if API access is not enabled.'

**If you need any more information about the script just comment thanks already **

the full output is: ' 14:21:54.090 - 403: Cannot write to DataStore from studio if API access is not enabled. 14:21:54.090 - Stack Begin 14:21:54.091 - Script 'ServerScriptService.Stats', Line 18 - global savedata 14:21:54.091 - Script 'ServerScriptService.Stats', Line 91 14:21:54.092 - Stack End '

line 17-18-19:

function savedata(dataname, playerid, value)
	game:GetService("DataStoreService"):GetDataStore(dataname):SetAsync(playerid, value --line 18
end

line 90 - 95

game.Players.PlayerRemoving:connect(function(player)
	savedata("Levels", player.userId, player:WaitForChild('Stats').Level.Value) -- line 91
    savedata("XP", player.userId, player:WaitForChild('Stats').XP.Value)
	savedata("AXP", player.userId, player:WaitForChild('Stats').XpNeeded.Value)
	savedata("Cor", player.userId, player:WaitForChild('Stats').Cor.Value)
end)

FULL SCRIPT:

local level = game:GetService("DataStoreService"):GetDataStore("Levels")
local xp = game:GetService("DataStoreService"):GetDataStore("XP")
local axp  = game:GetService("DataStoreService"):GetDataStore("AXP") -- amount needed

local cor = game:GetService("DataStoreService"):GetDataStore("Cor") -- money

local OHS  = game:GetService("DataStoreService"):GetDataStore("OneHandedSword")
local R  = game:GetService("DataStoreService"):GetDataStore("Rapier")
local THS  = game:GetService("DataStoreService"):GetDataStore("TwoHandedSword")

local Agility = game:GetService("DataStoreService"):GetDataStore("Agility")
local Stamina = game:GetService("DataStoreService"):GetDataStore("Stamina")
local Strength = game:GetService("DataStoreService"):GetDataStore("Strength")

---------------------------------------------------------------------------------

function savedata(dataname, playerid, value)
	game:GetService("DataStoreService"):GetDataStore(dataname):SetAsync(playerid, value)
end

game.Players.PlayerAdded:connect(function(player)
	local leader = Instance.new('Folder')
	leader.Name = "leaderstats"
	leader.Parent = player
	
	local Stats = Instance.new('Folder')
	Stats.Name = 'Stats'
	Stats.Parent = player
	
	local LevelUp = Instance.new("IntValue")
	LevelUp.Value = level:GetAsync(tostring(player.userId)) or 1
	LevelUp.Name = "Level"
	LevelUp.Parent = player:WaitForChild('Stats')
	
	local XpUp = Instance.new("NumberValue")
	XpUp.Value = xp:GetAsync(tostring(player.userId))
	XpUp.Name = "XP"
	XpUp.Parent = player:WaitForChild('Stats')
	
	
	local xpn = Instance.new("IntValue")
	xpn.Value = axp:GetAsync(tostring(player.userId)) or 200
	xpn.Name = "XpNeeded"
	xpn.Parent = player:WaitForChild('Stats')
	
	local Cor = Instance.new("NumberValue")
	Cor.Value = cor:GetAsync(tostring(player.userId)) or 0
	Cor.Name = "Cor"
	Cor.Parent = player:WaitForChild('Stats')
	
	local OneHandedSword = Instance.new("NumberValue")
	OneHandedSword.Value = OHS:GetAsync(tostring(player.userId)) or 1
	OneHandedSword.Name = "OneHandedSword"
	OneHandedSword.Parent = player:WaitForChild('Stats')
	
	local TwoHandedSword = Instance.new("NumberValue")
	TwoHandedSword.Value = THS:GetAsync(tostring(player.userId)) or 1
	TwoHandedSword.Name = "TwoHandedSword"
	TwoHandedSword.Parent = player:WaitForChild('Stats')
	
	local rap = Instance.new("NumberValue")
	rap.Value = R:GetAsync(tostring(player.userId)) or 1
	rap.Name = "Rapier"
	rap.Parent = player:WaitForChild('Stats')
	
	XpUp.Changed:connect(function()
		if player:WaitForChild("XP").Value >= player:WaitForChild("XpNeeded").Value then
			LevelUp.Value = LevelUp.Value+1
			LevelUp.Changed:connect(function()
				XpUp.Value = 0
			end)
			savedata("Levels", player.userId, LevelUp.Value)
			savedata("XP", player.userId, XpUp.Value)
			savedata("AXP", player.userId, xpn.Value)
			else
			savedata("Levels", player.userId, LevelUp.Value)
			savedata("XP", player.userId, XpUp.Value)
			savedata("AXP", player.userId, xpn.Value)
			end
		savedata("Levels", player.userId, LevelUp.Value)
		savedata("XP", player.userId, XpUp.Value)
		savedata("AXP", player.userId, xpn.Value)
	end)
	Cor.Changed:connect(function()
		savedata("Cor", player.userId, Cor.Value)
	end)
	savedata("Cor", player.userId, Cor.Value)
end)

game.Players.PlayerRemoving:connect(function(player)
	savedata("Levels", player.userId, player:WaitForChild('Stats').Level.Value)
    savedata("XP", player.userId, player:WaitForChild('Stats').XP.Value)
	savedata("AXP", player.userId, player:WaitForChild('Stats').XpNeeded.Value)
	savedata("Cor", player.userId, player:WaitForChild('Stats').Cor.Value)
end)