The forum frequently redirects my browser session to the following URL:

And ultimately returns the following URL

With the following message (or a variation of it):
Sorry, Temporary the ad request is unavailable.
I think it's a situation where the connection gets refused, but what I don't understand is why it's being redirected in the first place. Is this an ad that is supposed to fill a banner or side panel rather than re-route the entire browser session?

Is this happening elsewhere? It's been happening on my machines the past 24 hours.