How to fix that problem? (a nil value)

Error: Players.Diltz_3.PlayerGui.BookingGUI.MainScript:24: attempt to index local 'PlrName' (a nil value)

> FireServer: (LocalScript)

local EventRefreshRequest = game.ReplicatedStorage:WaitForChild("DataRefresh")

FindBTN.MouseButton1Click:connect(function()
	EventRefreshRequest:FireServer(PlrBox)
end)

OnServerEvent (Script)

local EventRefreshRequest = game.ReplicatedStorage.DataRefresh
local EventRefreshSend = game.ReplicatedStorage.DataRefreshSend
local SS = game:GetService("ServerStorage")

EventRefreshRequest.OnServerEvent:connect(function(Player,PlrBox)
	if SS:FindFirstChild(PlrBox.Text) then
		local Breakfast = SS:FindFirstChild(PlrBox.Text).Breakfast
		local Lunch = SS:FindFirstChild(PlrBox.Text).Lunch
		local Dinner = SS:FindFirstChild(PlrBox.Text).Dinner
		local Class = SS:FindFirstChild(PlrBox.Text).Class
		local Drink = SS:FindFirstChild(PlrBox.Text).Drink
		local PlrName = SS:FindFirstChild(PlrBox.Text).PlrName
		EventRefreshSend:FireClient(Player,Breakfast,Class,Dinner,Drink,Lunch,PlrName)
	end
end)

> OnClientEvent (LocalScript)

local EventRefreshSend = game.ReplicatedStorage:WaitForChild("DataRefreshSend")

EventRefreshSend.OnClientEvent:connect(function(Player,Breakfast,Class,Dinner,Drink,Lunch,PlrName)
	NameBox.Text = PlrName.Value
	ClassBox.Text = Class.Value
	BreakfastBox.Text = Breakfast.Value
	LunchBox.Text = Lunch.Value
	DinnerBox.Text = Dinner.Value
	DrinkBox.Text = Drink.Value
end)