Image/Video Ads Fallback Image Not Working

Hello, one of my experience qualifies for ads, it meets all of the requirements.

I’m trying to add a fallback image to the ads though, so its not just the default roblox logo.

To fix this issue I’ve tried this script:

local package = script.Parent
local adGui = package:WaitForChild('ADpart'):WaitForChild('AdGui')

local function updateFallbackImage()
	local fallbackImage = package:GetAttribute('FallbackImage')

	-- prepend "rbxassetid://" if the value is a base 10 number
	if tostring(tonumber(fallbackImage)) == fallbackImage then
		fallbackImage = "rbxassetid://114438701459171" .. fallbackImage
	end

	adGui.FallbackImage = fallbackImage
end

package:GetAttributeChangedSignal('FallbackImage'):Connect(updateFallbackImage)

-- run for the first time
if package:GetAttribute('FallbackImage') then 
	updateFallbackImage() 
end 

But that doesn’t work, I’ve also tried going to properties on the ad gui, and importing the image into the FallBack Image area.

I need any help I can get to add a fallback image to the ads, thank you!
(Sorry if I may seem dumb I’m new to ads, and also this script is on the ads default template thing)