[Cerrado] One of our mapped langauges and sites has disappeared.

Background of the issue:
I am trying to find where our IE site went to. We are using multi-lang with separate TLDs, such as en-ie for roomraccoon.ie and en-za for roomraccoon.co.za. I expected to see the homepage for IE at enlace oculto. Here is the link to a page where the issue can be seen: enlace oculto.

Symptoms:
One of our mapped languages and sites, specifically the IE site, has disappeared. It is redirecting to enlace oculto instead of showing the expected homepage for IE.

Questions:
Why has the IE site disappeared?
How can I restore the IE site to show the correct homepage?