John 16: 12 “I have yet many things to say to you, but you cannot bear them now. 13 When the Spirit of truth comes, he will guide you into all the truth; for he will not speak on his own authority, but whatever he hears he will speak, and he will declare to you the things that are to come. 14 He will glorify me, for he will take what is mine and declare it to you. 15 All that the Father has is mine; therefore I said that he will take what is mine and declare it to you.

That appears to have Jesus saying to the Apostles that they personally will be guided into understanding what has been revealed to them. It also echoes the admonition that the Spirit will guide the Church in its teaching mission.

That does not conflict with the Church's teaching and belief that the revelation ended with the death of the last Apostle.