can't access product site promoted by google due to googleadservices 'unable to connect'

   The site could be temporarily unavailable or too busy. Try again in a few moments.
   If you are unable to load any pages, check your computer’s network connection.
   If your computer or network is protected by a firewall or proxy, make sure that Firefox is permitted to access the web.

Tell me why google says this: Unable to connect An error occurred during a connection to www.googleadservices.com. The site could be temporarily unavailable or too busy. Try again in a few moments. If you are unable to load any pages, check your computer’s network connection. If your computer or network is protected by a firewall or proxy, make sure that Firefox is permitted to access the web. when I click on an advert for a product provided (I assume) by google at the top of search results. I have cleared the cache and cookies. Latest firefox on ubuntu 22.