Players character resets online but not in studio?

When I launch my game online and insert this script that replaces the players character into the PlayerScripts, after a few seconds, it resets the players character to its default and reloads the startergui. I can't find where it's going wrong. Thanks for any help!

wait(.1)
local player
while not player do
	wait()
	player = game:GetService('Players').LocalPlayer
	
end
function weld(p1,p2,c0)
	local w = Instance.new("Weld",p1)
	w.Part0 = p1
	w.Part1 = p2
	w.C0 = c0 or p1.CFrame:inverse() * p2.CFrame
	return w
end

function onSpawn()
	local char = game.ReplicatedStorage["New Player"]:Clone()
	local SpawnLocation = game.Workspace.SpawnLocation2
	char.Parent = workspace
	char.Name = player.Name
	char:MoveTo(SpawnLocation.Position)
	
	local prevChar = player.Character
	wait()
	player.Character = char
	prevChar:Destroy()
	
	if char:FindFirstChild("Humanoid") then
	char.Humanoid:Destroy()
	end
	local human = Instance.new("Humanoid", char)
	char.Archivable = false
	human.WalkSpeed = 8

	wait(1)

	human.Died:connect(function()
	wait(1)
		onSpawn()
		SetOutfit()
		wait(.01)
	player.Character.Humanoid.Running:connect(onGround)

	
	end)
	
	--Player Values
	local move_left = false
	local move_right = false
	local already_ran = false
	local grounded = false
	local idleAnimation = Instance.new("Animation")
	idleAnimation.AnimationId = "rbxassetid://317651678"
	local runningAnimation = Instance.new("Animation")
	runningAnimation.AnimationId = "rbxassetid://319211805"
	local R2 = Instance.new("Animation")
	R2.AnimationId = "rbxassetid://312976450"
	local I2 = Instance.new("Animation")
	I2.AnimationId = "rbxassetid://313623015"
	local J = Instance.new("Animation")
	J.AnimationId = "rbxassetid://326922088"
		
	function playAnimation(parent)
		local AnimTrack = player.Character.Humanoid:LoadAnimation(parent)
		AnimTrack:Stop()
		wait(.01)
		AnimTrack:Play()
	end
	
	function onGround(speed)
		if grounded == false then
			grounded = true
		end
		if speed > 1 and player.PlayerGui.SwordPlaySystemMK2.CombatStage.Value == ("Offensive") then
			if already_ran == false then
				already_ran = true
				playAnimation(runningAnimation)
				
			end
			
				elseif  speed > 1 and player.PlayerGui.SwordPlaySystemMK2.CombatStage.Value == ("Idle") then
					if already_ran == false then
						already_ran = true
						playAnimation(R2)
					end	
					
		
			elseif speed > 0 and already_ran == true and player.PlayerGui.SwordPlaySystemMK2.CombatStage.Value == ("Offensive")  then
			already_ran = false
			playAnimation(idleAnimation)
			
			elseif speed > 0 and already_ran == true and player.PlayerGui.SwordPlaySystemMK2.CombatStage.Value == ("Idle")  then
			already_ran = false
			playAnimation(I2)
					
				end
			end
		end
	
onSpawn()


	player.Character.Humanoid.Running:connect(onGround)
	
	--SetOutfit()
	wait(0.5)
	PE.Parent = player.Character
	local SP = game.Lighting.SwordPlaySystemMK2:Clone()
	SP.Parent = player.PlayerGui
	SP.Disabled = false