The Catholic University of America nixed a Wednesday screening of the film “Milk,” a biopic about the first openly gay official to be elected to public office, Catholic news website Crux reported.

The Washington, D.C. school’s College Democrats organized the event as part of LGBT Awareness Month. Students told Crux that the school approved the screening and a panel about the gay rights movement and Democratic politics last month.

“I was extremely disappointed that this was happening. I thought this was an incredibly asinine decision that the school made,” College Democrats member Jackson Tovar told Crux.

On Wednesday morning, school officials told students that they were concerned with the size of the rainbow flag on the flyer and had a problem with the description of the event as part of LGBT Awareness Month.

Catholic University does not permit events that advocate beliefs contrary to those of the Catholic Church. In 2012 the school did not allow students to form an LGBT student group.

In a statement, the College Democrats said they were “disappointed” that the event was cancelled, but said that they would try to reschedule it for a later date.