All episode details return error

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for example I tried that :

showEpisode = Episode()
episodeInfo = showEpisode.details("71728", "1", "19")

and it return me an error, but when i go to : https://api.themoviedb.org/3/tv/71728/season/1/episode/19?api_key={api_key}&language=fr&page=1 it work, what's happening, did I do to many requests ?