The Catholic Church says that the authority of the church resides in the Magisterium (Pope, Cardinals and Bishops)

The Bible says that the authority of the church resides in Jesus Christ through His Word under the guidance of the Holy Spirit.

The problem that Catholics have is that define church as an institution as opposed to a body of born again believers.

Authority (CARM)

D. “The task of giving an authentic interpretation of the Word of God, whether in its written form or in the form of Tradition, has been entrusted to the living teaching office of the Church alone. Its authority in this matter is exercised in the name of Jesus Christ,” (CCC par. 85).

E. ” The Church’s Magisterium exercises the authority it holds from Christ…” (CCC, par. 88).

F. “But I would not believe in the Gospel, had not the authority of the Catholic Church already moved me,” (CCC, 119).

G. “The power which they [catholic bishops] exercise personally in the name of Christ, is proper, ordinary, and immediate, although its exercise is ultimately controlled by the supreme authority of the Church,” (CCC, par. 895).

H. “Only priests who have received the faculty of absolving from the authority of the Church can forgive sins in the name of Christ,” (CCC, par. 1495).

“The Second Vatican Council’s Decree on Ecumenism explains: “For it is through Christ’s Catholic Church alone, which is the universal help toward salvation, that the fullness of the means of salvation can be obtained. It was to the apostolic college alone, of which Peter is the head, that we believe that our Lord entrusted all the blessings of the New Covenant, in order to establish on earth the one Body of Christ into which all those should be fully incorporated who belong in any way to the People of God.” (CCC 816).