Some of Hahn’s substantial theological errors:
he claims that Adam and Eve ate from the fruit of the tree because Satan threatened them with death.
he claims that the original sin of Adam was in not engaging the serpent (which was really a dragon or other monster) in the garden in mortal combat, at the sacrifice of his own life, for the sake of his beloved (Eve).
he claims that the wine mixed with gall (corrupted wine), on the sponge, the wine that Jesus rejected, is the fourth cup of the last supper (the first Mass). There are numerous theological problems with this claim, including that it equates corrupted wine with the earlier consecrated wine (the Eucharist), that it was rejected by Christ, yet included by Hahn as if equal to the other three cups, that this idea is not found in Tradition, nor does Scripture support the idea of even three cups at the last supper.
he represents the Holy Spirit as feminine, in contradiction to Liturgiam Authenticam, in contradiction to Tradition and Scripture.
Hahn calls the Holy Spirit “mother,” “motherly,” “maternal,” “feminine,” “womanhood,” and “bridal,” (New Oxford Review,
newoxfordreview.org/note.jsp?did=0207-notes-gnosticism)
See also this article:
newoxfordreview.org/article.jsp?did=0604-oneill
But since Father, Son, and Spirit have one and the same Nature, it cannot be in the nature of the Holy Spirit to be motherly, maternal, feminine, etc.
In addition, Hahn’s theology is often plagued by novelties, not found in Tradition, Scripture, or Magisterium. It is as if he is reinventing the Christian Faith.