It should be noted that these statements were never part of any official Church proclamation, and never appeared in the L’Osservatore Romano, the official newspaper of the Holy See.
However, when Fr. Berti tried to have the Vatican Press publish the work, it was rejected by two commissioners of the Holy Office who had studied the works.
Pope Pius XII did nothing to stop this rejection, which was followed later by a condemnation, when Fr. Berti went to a lay publisher to publish the works (even though he had signed an agreement not to publish the works).
Again, Pope Pius XII did not stop the condemnation. It is believed that if the Pope did originally approve of the writings, it may have been that he only saw excerpts (the Pope’s spiritual director, Cardinal Augustin Bea stated that he (the Cardinal) only read certain small parts of the books, and had no objections, but no one knows which parts he read).
Finally, Pope John XXIII, also, signed a declaration of condemnation.