"Edit page" will not accept my request to add a movie title to the Elizabeth Moss page.

@twodoggie9z80 This is because she is already listed in the cast list for the film — see cast position #22 on https://www.imdb.com/title/tt2837574/fullcredits/ and it is in her acting credits at https://www.imdb.com/name/nm0005253/ Hope this helps.