Did any of those Catholics believe that the Throne of Peter could be vacant for 50 or more years? What does the Ordinary Magisterium say about that?
I know we are getting off-topic here, but I thought I would also provide you this quote, Jehanne. From the Catholic Encyclopedia, in the article "election of Popes", it states:
"Between the death of Clement IV (1268) and the coronation of Gregory X (1272) an interregnum of nearly three years intervened. To prevent a repetition of so great a misfortune the pope in the Council of Lyons (1179) issued the Decree "Ubi periculum""Notice the Church only refers to such a long interregnum as a "misfortune".