This dialog script does not work in a regular server, but does in studio. Why?

I have this script:

local playerthumb = "https://www.roblox.com/headshot-thumbnail/image?userId=%s&width=420&height=420&format=png"
script.Parent.DialogChoiceSelected:Connect(function(plr, choice)
	print(choice.Name)
	if choice.Name == "GetOffice" then
		local room = findRoom(plr)
		if room then
			local card = game.Lighting.keyTemplate:Clone()
			card.Parent = plr.Backpack
			card.Name = ("[ %s ]"):format(room.Name)
			card = card.Handle
			local front = card.front
			local back = card.back
			front.Frame.BackgroundColor3 = BrickColor.Red().Color
			front.thumb.Image = playerthumb:format(plr.UserId)
			front.name.Text = plr.Name
			front.rank.Text = "Owner"
			wait(0.25)
			game.Chat:Chat(script.Parent.Parent, "Your office is #" .. room.Name:sub(7), Enum.ChatColor.Green)
		else
			wait(0.25)
			game.Chat:Chat(script.Parent.Parent, "Sorry, I cant find a room for you right now", Enum.ChatColor.Red)
		end
	elseif choice.Name == "VisitOffice" then
		local card = game.Lighting.keyTemplate:Clone()
		card.Parent = plr.Backpack
		card.Name = "Visitor Car"
		card = card.Handle
		local front = card.front
		local back = card.back
		front.Frame.BackgroundColor3 = BrickColor.Green().Color
		front.thumb.Image = playerthumb:format(plr.UserId)
		front.name.Text = plr.Name
		front.rank.Text = "Visitor"
	else
		game.Chat:Chat(script.Parent.Parent, "Come back anytime!", Enum.ChatColor.Blue)
	end
	warn("done")
end)

And it works in studio, but not in regular servers.

EDIT: The script's parent is a Dialog with two DialogChoices

EDIT2: Cut down script length

FilteringEnabled = true and StreamingEnabled = false