Gui not opening OnClick with FilteringEnabled?

If a part is clicked using a ClickDetector, a Gui (in the StarterGui folder) should show up. This works in Studio but not when I test the game with FilteringEnabled. How can I fix that? I use this script for interacting with things (i.e. turning on the tv, light switches, etc.) and it works fine for things like that. I figured it would work for this as well, but it doesn't.

local ClickerModule = require(343254562)
local clickEvent = ClickerModule.RemoteEvent
local interactiveParts = {}
local activationDistance = 14
local guiOpen = false
local changingState = false

for i, v in pairs(script.Parent:GetChildren()) do
	if v.Name == "Interactive" then
		table.insert(interactiveParts, v)
	end
end

local function distanceToCharacter(player, part)
	local character = player.Character
	if character then
		local torso = character:FindFirstChild("Torso")
		if torso then
			return((torso.Position - part.Position).magnitude)
		end
	end
	return math.huge
end

clickEvent.OnServerEvent:connect(function(player, part)
	local isPart = false
	for i = 1, #interactiveParts do
		if part == interactiveParts[i] then
			isPart = true
		end
	end
	if isPart and player.Character and distanceToCharacter(player, part) <= activationDistance then
		if guiOpen == true and changingState == false then
			changingState = true
				player.PlayerGui.Dialog.Frame1.Visible = true -- do this on click

			changingState = false
			guiOpen = false
		elseif changingState == false then
			changingState = true
				player.PlayerGui.Dialog.Frame1.Visible = true -- reopen if clicked again

			changingState = false
			guiOpen = true
		end
	end
end)