There are still discounted rooms available for the dates of the trainings (Oct. 11th - (check out) 15th) that you can book through this link.
However, during the dates of the conference talks (Oct. 15th - 18th), the hotel is now sold out!
But not to worry, there are several other hotels right next to the conference center including:
Agua de Ibiza Hotel or Catalonia Royal.
Use the link below to book a room at the hotel at the discounted conference rate: