Recently I had a conversation, with my priest, regarding how can indefectible Catholic Church can produce something that would lead members to hell. He simple said that the church can error. Note: It is implied he was refering to non-infallible items.
I think it is a big mistake to consider something, that will lead people to hell, as simply an "error". I have hard time trying to find anything in the history of Church, where the non-fallible teaching as an "error" and could lead others to hell.
Also, I appreciate the part in this article, where any doubt about a non-infallible teaching of the church is not met with open dissent. The Church is given the chance to clarify. To publicly remove assent of your will, would be very imprudent act.
https://akacatholic.com/in-god-we-trust/
The term "The Church" takes on many different meanings which today, most of which are ambiguous, as is the case in this OP. No,
the Church, which is Christ, cannot err. The Church's "non-infallible magisterium" is an altogether erroneous term, there is no more a "non-infallible magisterium" then there is a "non-infallible dogma" - iow, there is no such a thing as a non-infallible magisterium. The misunderstanding of this term has led many into believing that the heresies and errors of V2 are actually taught by the Church.
In
Tuas Libenter, Pope Pius IX explains the Church's magisterium, which is always infallible:
"... all that has been handed down as divinely revealed by the ordinary teaching authority of the entire Church spread over the whole world, and which, for this reason, Catholic theologians, with a universal and constant consent, regard as being of the faith."
Not sure what happened to poster Bellator Dei, but in the past he posted numerous different quotes from papal Bulls, Encyclicals etc., all teaching that the Magisterium of the Church is always infallible. Looks like he not only got banned, all of his posts have been deleted as well. Too bad, I would have liked to point you toward some of his posts.