Argument 1 missing or nil error on roblox studio - lua

Question

Hope you are having a good day. I am just here to say I have watched Alvinblox's egg hatching system tutorial and I am currently at part 2. There is a new error called "Argument 1 missing or nil" it is at line 60 in the petFollowPlayer script (local pet = game.ReplicatedStorage.HatchablePets:FindFirstChild(petName)) here is the code
petFollowPlayer
local function equipPet(player, pet, petName)
print(player)
local character = player.Character
if pet ~= nil and character ~= nil then
if character:FindFirstChild(player.Name.."s' pet") then
character(player.Name.."s' pet"):Destroy()
end
if character.HumanoidRootPart:FindFirstChild("attachmentCharacter") then
character.HumanoidRootPart:FindFirstChild("attachmentCharacter"):Destroy()
end
pet.Name = player.Name.."'s pet"
pet:SetPrimaryPartCFrame(character.HumanoidRootPart.CFrame)
local modelSize = pet.PrimaryPart.Size
local attachmentCharacter = Instance.new("Attachment")
attachmentCharacter.Visible = false
attachmentCharacter.Parent = character.HumanoidRootPart
attachmentCharacter.Position = Vector3.new(-1,0,1) + modelSize
attachmentCharacter.Name = "attachmentCharacter"
local attachmentPet = Instance.new("Attachment")
attachmentPet.Parent = pet.PrimaryPart
local alignPosition = Instance.new("AlignPosition")
alignPosition.MaxForce = 25000
alignPosition.Attachment0 = attachmentPet
alignPosition.Attachment1 = attachmentCharacter
alignPosition.Responsiveness = 25
alignPosition.Parent = pet
local alignOrientation = Instance.new("AlignOrientation")
alignOrientation.MaxTorque = 25000
alignOrientation.Attachment0= attachmentPet
alignOrientation.Attachment1= attachmentCharacter
alignOrientation.Responsiveness = 25
alignOrientation.Parent = pet
pet.Parent = character
end
end
game.Players.PlayerAdded:Connect(function(player)
local equipedPet = Instance.new("StringValue")
equipedPet.Name = "EquipedPet"
equipedPet.Parent = player
equipedPet.Value = ""
player.CharacterAdded:Connect(function(char)
if game.ReplicatedStorage:WaitForChild("HatchablePets"):FindFirstChild(equipedPet.Value) then
local clone =game.ReplicatedStorage:WaitForChild("HatchablePets"):FindFirstChild(equipedPet.Value):Clone()
equipPet(player,clone)
end
end)
equipedPet.Changed:Connect(function ()
if equipedPet.Value ~= nil then
if game.ReplicatedStorage:WaitForChild("HatchablePets"):FindFirstChild(equipedPet.Value) then
equipPet(player, game.ReplicatedStorage:WaitForChild("HatchablePets"):FindFirstChild(equipedPet.Value):Clone())
end
end
end)
end)
game.ReplicatedStorage.equipPet.OnServerEvent:Connect(function(player,petName)
local pet = game.ReplicatedStorage.HatchablePets:FindFirstChild(petName)
if pet and player.PetInventory:FindFirstChild(petName) then
player.EquipedPet.Value = petName
end
end)
game.ReplicatedStorage.unequipPet.OnServerEvent:Connect(function(player)
player.EquippedPet.Value = ""
if player.Character:FindFirstChild(player.Name.."'s name") then
player.Character[player.Name.."'s pet"]:Destroy()
end
if player.Character.HumanoidRootPart:FindFirstChild("attachmentCharacter") then
player.Character.HumanoidRootPart:FindFirstChild("attachmentCharacter"):Destroy()
end
end)
buyBasicEgg
local cost = 50
local petMoudle = require(game.ServerScriptService.BasicEggModule)
local prompt = workspace["Egg Holder"].Part.ProximityPrompt
prompt.Triggered:Connect(function (player)
if player.leaderstats.Cash.Value >= cost then
player.leaderstats.Cash.Value = player.leaderstats.Cash.Value - cost
local pet = petMoudle.chooseRandomPet()
local petval = Instance.new("StringValue")
petval.Name = pet.Name
petval.Parent = player.PetInventory
print(pet.Name.." selected")
game.ReplicatedStorage.HatchEgg:FireClient(player, pet)
end
end)
basicEggAnimation
local camera = workspace.Camera
local studio = workspace.Studio
local template = script.Parent.Pets.ScrollingFrame.Template
local scrollingFrame = script.Parent.Pets.ScrollingFrame
local buttonConnection = {}
local function setTemplateEquipped()
for i,v in pairs(scrollingFrame:GetChildren()) do
if v:FindFirstChild("Equipped") then
v.Equipped.Text = "UNEQUIPPED"
v.Equipped.TextColor3 = Color3.fromRGB(255,0,0)
end
end
template.Equiped.Text = "Equipped"
template.Equiped.TextColor3 = Color3.fromRGB(0,255,0)
end
local function addToFrame(pet)
local newTemplate = template:Clone()
newTemplate.Name = pet.Name
newTemplate.petName.Text = pet.Name
newTemplate.Parent = scrollingFrame
newTemplate.Visible = true
local camera = Instance.new("Camera")
local newPet = pet:Clone()
newPet.Parent = newTemplate.ViewportFrame
camera.CFrame = CFrame.new(newPet.PrimaryPart.Position + (newPet.PrimaryPart.CFrame.LookVector * 3), newPet.PrimaryPart.Position)
camera.Parent = newTemplate.ViewportFrame
newTemplate.ViewportFrame.CurrentCamera = camera
buttonConnection[#buttonConnection+1] = newTemplate.MouseButton1Click:Connect(function()
if newTemplate.Equiped.Text == "EQUIPPED" then
game.ReplicatedStorage.unequipPet:FireServer(pet.Name)
newTemplate.Equiped.Text = "UNEQUIPPED"
newTemplate.Equiped.TextColor3 = Color3.fromRGB(255,0,0)
else
game.ReplicatedStorage.equipPet:FireServer()
setTemplateEquipped(newTemplate)
end
end)
end
game.ReplicatedStorage.HatchEgg.OnClientEvent:Connect(function (pet)
addToFrame(pet)
camera.CameraType = Enum.CameraType.Scriptable
camera.CFrame = studio.CameraPart.CFrame
wait(1.5)
for i = 1,50,1 do
studio["Egg Mesh"].Size = studio["Egg Mesh"].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 = studio["Egg Mesh"].Position
explosion.ExplosionType = Enum.ExplosionType.NoCraters
explosion.DestroyJointRadiusPercent = 0
explosion.Parent = studio["Egg Mesh"]
studio["Egg Mesh"].Transparency = 1
local petClone = pet:Clone()
for i,v in pairs(petClone:GetChildren()) do
if v:IsA("ParticleEmitter") then
v.Enabled = true
end
end
petClone:SetPrimaryPartCFrame(CFrame.new(studio["Egg Mesh"].Position, studio.CameraPart.Position))
petClone.Parent = studio
petClone.PrimaryPart.Position = Vector3.new(-14.382, -8.112, -605.565)
petClone.PrimaryPart.Anchored = true
local tweenInfo = TweenInfo.new(
2,
Enum.EasingStyle.Bounce,
Enum.EasingDirection.Out,
0,
false,
0
)
local TweenService = game:GetService("TweenService")
local targetVector = petClone.PrimaryPart.Position + (petClone.PrimaryPart.CFrame.lookVector * 5) + Vector3.new(0,0.75,0)
local lookVector = petClone.PrimaryPart.Position
local targetCframe = CFrame.new(targetVector, lookVector)
local propsToTween = { CFrame = targetCframe }
local tween = TweenService:Create(camera, tweenInfo, propsToTween)
tween:Play()
wait(5)
for i,v in pairs(petClone:GetChildren()) do
if v:IsA("ParticleEmitter") then
v.Enabled = false
end
end
camera.CameraType = Enum.CameraType.Custom
studio["Egg Mesh"].Transparency = 0
studio["Egg Mesh"].Size = Vector3.new(4.732, 6, 4.732)
petClone:Destroy()
end)
If you can help thank you so much it will be very appreciated :)

Answer 1

Looking at the line local pet = game.ReplicatedStorage.HatchablePets:FindFirstChild(petName)
The error is telling you that, for some reason, petName isn't defined. So looking at how the variable is defined, we need to check how game.ReplicatedStorage.equipPet is called. So looking in the addToFrame local function, you call it like this : game.ReplicatedStorage.equipPet:FireServer(). Your problem is that you haven't provided the pet name at all. So just do the same thing you did with the unequipPet event.
buttonConnection[#buttonConnection+1] = newTemplate.MouseButton1Click:Connect(function()
if newTemplate.Equiped.Text == "EQUIPPED" then
game.ReplicatedStorage.unequipPet:FireServer(pet.Name)
newTemplate.Equiped.Text = "UNEQUIPPED"
newTemplate.Equiped.TextColor3 = Color3.fromRGB(255,0,0)
else
game.ReplicatedStorage.equipPet:FireServer(pet.Name)
setTemplateEquipped(newTemplate)
end
end)