Animation not functioning even though it worked earlier

[WarnFromPlayer (blitz)]

So I was scripting and tested the game and I wondered why it didn’t have animations because it was working earlier I was just asking if anybody knew why and how could I fix it

local function animateMob(object)
	local humanoid = object:WaitForChild("Humanoid")
	local animationsFolder = object:WaitForChild("Animations")

	if humanoid and animationsFolder then
		local walkAnimation = animationsFolder:WaitForChild("Walk")
		if walkAnimation then
			local animator = humanoid:FindFirstChild("Animator") or Instance.new("Animator", humanoid)
			local walkTrack = animator:LoadAnimation(walkAnimation)
			walkTrack:Play()
		end
	else
		warn("No humanoid/animation folder for", object.Name)
	end
end

workspace.Mobs.ChildAdded:Connect(animateMob)

[WarnFromPlayer (blitz)]

I fixed the error turns out I used FindFirstChild and then used Roblox Studios run command so there was no players so the animations didn’t run at all