Also getting this issue, I have regenerated my API key and still can't be authorized thru the key or token. Not sure if it takes a while for the change to come into effect.

maybe could help you the return is wrapped in a function called cachedMoviesGenres and the node route code apart :

return [ { id: 28, name: 'Action' }, { id: 12, name: 'Adventure' }, { id: 16, name: 'Animation' }, { id: 35, name: 'Comedy' }, { id: 80, name: 'Crime' }, { id: 99, name: 'Documentary' }, { id: 18, name: 'Drama' }, { id: 10751, name: 'Family' }, { id: 14, name: 'Fantasy' }, { id: 36, name: 'History' }, { id: 27, name: 'Horror' }, { id: 10402, name: 'Music' }, { id: 9648, name: 'Mystery' }, { id: 10749, name: 'Romance' }, { id: 878, name: 'Science Fiction' }, { id: 10770, name: 'TV Movie' }, { id: 53, name: 'Thriller' }, { id: 10752, name: 'War' }, { id: 37, name: 'Western' }, ]

    if (filteredGenres.length  is 0) {
        return cachedMoviesGenres(languageISO);
    } else {
        return filteredGenres;
    }
} catch (error) {
    console.log(error);
    throw new Error({ error: error.message });
}

See my reply here: https://www.themoviedb.org/talk/6556ab3ab5400214d82be7c9#6556cc63d4fe0400e1b3d1a9