Regarding Amoris Laetitia, I think Pius IX’ listed errors #65 through #68, display the heresy of the former.
65. The doctrine that Christ has raised marriage to the dignity of a sacrament cannot be at all tolerated. — Apostolic Letter “Ad Apostolicae,” Aug. 22, 1851.
66. The Sacrament of Marriage is only a something accessory to the contract and separate from it, and the sacrament itself consists in the nuptial benediction alone. — Ibid.
67. By the law of nature, the marriage tie is not indissoluble, and in many cases divorce properly so called may be decreed by the civil authority. — Ibid.; Allocution “Acerbissimum,” Sept. 27, 1852.
68. The Church has not the power of establishing diriment impediments of marriage, but such a power belongs to the civil authority by which existing impediments are to be removed. — Damnatio “Multiplices inter,” June 10, 1851.
???
Which of the following two statements does the syllabus condemn:
A) Christ has raised marriage to the dignity of a sacrament.
B) Christ has not raised marriage to the dignity of a sacrament.