Help for fans and contributors does not appear

These three are the links to help for IMDB Pro, IMDB fans and IMDB Contributors, respectively, and only the first one works, the other two don't work. https://help.imdb.com/imdbpro?ref_=helpsect_tab https://help.imdb.com/imdb?ref_=helpsect_tab https://help.imdb.com/contribution?ref_=helpsect_tab You developers could take a look and fix this.