Whatsoever you bind on Earth will be bound in Heaven, whatsoever you loose on Earth will be loosed in Heaven..
Christ wouldn't have given the power to bind in Heaven and then let an erroneous decision be made.
Christ didn’t give the Pope the power to make stuff up and demand it be considered canon.
Christ did give power to the Church members from the lowest to the highest to confront and correct sin within its ranks so that loosed on earth it would not also be loosed in heaven, but bound on earth the contagion would not reach heaven.