I have gotten this error in the output. Please help?

This is the error

ServerScriptStorage.ObbyHandler:25: attempt to index nil with 'leaderstats'

This is the script

local obbyStages = workspace:WaitForChild("ObbyStages")

for _,stage in pairs(obbyStages:GetChildren()) do

stage.Touched:connect(function(hit)

	local hum
	
	if hit.Parent:FindFirstChild("Humanoid") then
	
		hum = hit.Parent.Humanoid

end

	if hit.Parent and hit.Parent.Parent:FindFirstChild("Humanoid") then

		hum = hit.Parent.Parent.Humanoid

	end

		if hum then

			local plr = game.Players:GetPlayerFromCharacter(hum.Parent)
			
			local plrStage = plr.leaderstats.Stage.Value
		
			if tonumber(stage.Name) == plrStage + 1 then

				plr.leaderstats.Stage.Value = plr.leaderstats.Stage.Value + 1

			elseif tonumber(stage.Name) > plrStage + 1 then

				hum.Health = 0
			
			end


	end


end)

end