Why does my robbable bank not work? Bank GUI not showing up.

I know this code is similar to Alvin_Blox's code on the robbable bank but I need help with it.

function GenerateRegion3(part)
	local Region3FromPart = Region3.new(part.Position-(part.Size/2), part.Position+(part.Size/2))
	return Region3FromPart
end

function FindPlayersInRegion3FromPart(PartToCreate)
	local reg = GenerateRegion3(PartToCreate)
	local playersFoundInRegion = game.Workspace:FindPartsInRegion3(reg, nil, math.huge)
	local PlayersInReg = {}
	
	for _, part in pairs(playersFoundInRegion) do
		print("Got in for loop for parts in region3")
			local player = game.Players:GetPlayerFromCharacter(part.Parent)
			if player then
				print("Another One!")
				for _, v in pairs(PlayersInReg) do
					print("Got in loopfor players")
					if v.Name == player.Name then
						print("Test2")
						playerFoundInRegion3 = true
					end
				end
				if playerFoundInRegion3 == false then
					table.insert(playersFoundInRegion, player)
				end
				playerFoundInRegion3 = false
			end
	end
	for _, player in pairs(PlayersInReg) do
		print("EnteredForLoop player")
		if player:FindFirstChild("IsRobbing").Value == false then
			print("Firing remote function!")
			game.ReplicatedStorage.RobberyGUIEnable:FireClient(player, true)
		end
		player.IsRobbing.Value = true

Any help or anything is appreciated!