Three Little Sisters is a 1944 American comedy film directed by Joseph Santley and written by Olive Cooper. The film stars Mary Lee, Ruth Terry, Cheryl Walker, William Terry, Jackie Moran and Charles Arnt. The film was released on July 31, 1944, by Republic Pictures.
Three Little Sisters is funny
The context says that Three Little Sisters is a comedy, so it is a funny film. I think the system did not understand that comedies are funny.