Help me with this output error

  1. What do you want to achieve? I want to fix the error and to show the egg.

  2. What is the issue?

  3. What solutions have you tried so far? I tried to change the script, nothing works.

Script:

local TweenService = game:GetService("TweenService")
 
local camera = game.Workspace.Camera
local ClassicEggStudio = game.Workspace:WaitForChild("ClassicEggStudio")

game.ReplicatedStorage.HatchEgg.OnClientEvent:Connect(function(pet)
	camera.CameraType = Enum.CameraType.Scriptable
	camera.CFrame = game.Workspace.CurrentCamera.CFrame
	
	wait(1.5)
	
	for i = 1, 50, 1 do
		ClassicEggStudio.ClassicEgg.Size = ClassicEggStudio.ClassicEgg.Size + Vector3.new(0.1,0.1,0.1)
		wait(0.01)
	end
	
	
	
	local explosion = Instance.new("Explosion")
	explosion.BlastRadius = 10
	explosion.BlastPressure = 0
	explosion.Position = ClassicEggStudio.ClassicEgg.Position
	explosion.ExplosionType = Enum.ExplosionType.NoCraters
	explosion.DestroyJointRadiusPercent = 0
	
	explosion.Parent = ClassicEggStudio.ClassicEgg
	
	ClassicEggStudio.ClassicEgg.Transparency = 1
	
	local petClone = pet:Clone()
	
	for i, v in pairs(petClone:GetChildren()) do
		if v:IsA("BasePart") then
			v.Anchored = true 
		end
	end
	
	for i, v in pairs(ClassicEggStudio.Confetti:GetChildren()) do
		if v:IsA("ParticleEmitter") then
			v.Enabled = true
		end
	end
	
	
	petClone:SetPrimaryPartCFrame( CFrame.new(ClassicEggStudio.ClassicEgg.Position,ClassicEggStudio.CamPart.Position) )

1. List item

petClone.Parent = ClassicEggStudio 
	
	local tweenInfo = TweenInfo.new(
		2,
		Enum.EasingStyle.Bounce,
	    Enum.EasingDirection.Out,
		0,
		false,
		0
	)
	

	local tween = TweenService:Create(camera, tweenInfo, {CFrame = CFrame.new(petClone.PrimaryPart.Position + (petClone.PrimaryPart.CFrame.lookVector * 5) + Vector3.new(0,0.75,0)),petClone.PrimaryPart.Position})
	
	tween:Play()

    wait(5)

    for i, v in pairs(ClassicEggStudio.Confetti:GetChildren()) do
		if v:IsA("ParticleEmitter") then
			v.Enabled = false
		end
	end

	    camera.CameraType = Enum.CameraType.Custom
	    ClassicEggStudio.ClassicEgg.Transparency = 0
	    ClassicEggStudio.ClassigEgg.Size = Vector3.new(-169.043, -375.934, 205.755)
        petClone:Destroy()
    
end)	

Set a primary part for the model!

You need to click on the pet model and put a primarypart

Go to where the pet is, click on it, click the “PrimaryPart” property and choose a child.
More information here : Model | Documentation - Roblox Creator Hub

I can’t CFrame is’t a part of the explorer/game

Where’s the pet model located???

I tried, it says exactly the same thing.