Running it against the working examples, librarySectionID still returns None; here it is against The Americans (2013):
bash-5.0# ./cb-dump
show: <Show:10:The-Americans-(2013)>
season: <Season:93:The-Americans-(2013)-s1>
episode: <Episode:94:The-Americans-(2013)-s01e01>
{'_server': <PlexServer:https://p00.bluemagg>, '_data': <Element 'Video' at 0x7fd6b6bb35e0>, '_initpath': '/library/metadata/93/children', '_details_key': '/library/metadata/94?checkFiles=1&includeExtras=1&includeRelated=1&includeOnDeck=1&includeChapters=1&includePopularLeaves=1&includeMarkers=1&includeConcerts=1&includePreferences=1', 'listType': 'video', 'addedAt': datetime.datetime(2018, 8, 29, 17, 55, 56), 'key': '/library/metadata/94', 'lastViewedAt': datetime.datetime(2018, 8, 30, 23, 56, 22), 'librarySectionID': None, 'ratingKey': 94, 'summary': 'The Americans is a period drama about the complex marriage of two KGB spies posing as Americans in suburban Washington D.C. shortly after Ronald Reagan is elected President. The arranged marriage of Philip and Elizabeth Jennings grows more passionate and genuine by the day, but is constantly tested by the escalation of the Cold War. Tensions heighten upon the arrival of a new neighbor, Stan Beeman, an FBI agent. ', 'thumb': '/library/metadata/94/thumb/1579807227', 'title': 'Pilot', 'titleSort': 'Pilot', 'type': 'episode', 'updatedAt': datetime.datetime(2020, 1, 23, 13, 20, 27), 'viewCount': 1, 'sessionKey': None, 'usernames': [], 'players': [], 'transcodeSessions': [], 'session': [], 'viewedAt': None, 'accountID': None, 'playlistItemID': None, '_seasonNumber': '1', 'art': '/library/metadata/10/art/1579807227', 'chapterSource': None, 'contentRating': 'TV-MA', 'duration': 4265248, 'grandparentArt': '/library/metadata/10/art/1579807227', 'grandparentKey': '/library/metadata/10', 'grandparentRatingKey': 10, 'grandparentTheme': '/library/metadata/10/theme/1579807227', 'grandparentThumb': '/library/metadata/10/thumb/1579807227', 'grandparentTitle': 'The Americans (2013)', 'guid': 'com.plexapp.agents.thetvdb://261690/1/1?lang=en', 'index': 1, 'originallyAvailableAt': datetime.datetime(2013, 1, 30, 0, 0), 'parentIndex': '1', 'parentKey': '/library/metadata/93', 'parentRatingKey': 93, 'parentThumb': '/library/metadata/93/thumb/1579807227', 'parentTitle': 'Season 1', 'rating': 7.8, 'viewOffset': 0, 'year': 2013, 'directors': [], 'media': [<Media:145>], 'writers': [<Writer:Joe-Weisberg>], 'labels': [], 'collections': [], 'chapters': [], 'markers': []}
Against season 10 of Curb Your Enthusiasm:
bash-5.0# ./cb-dump
show: <Show:3566:Curb-Your-Enthusiasm>
season: <Season:3567:Curb-Your-Enthusiasm-s10>
episode: <Episode:3568:Curb-Your-Enthusiasm-s10e01>
{'_server': <PlexServer:https://p00.bluemagg>, '_data': <Element 'Video' at 0x7faaa20094f0>, '_initpath': '/library/metadata/3567/children', '_details_key': '/library/metadata/3568?checkFiles=1&includeExtras=1&includeRelated=1&includeOnDeck=1&includeChapters=1&includePopularLeaves=1&includeMarkers=1&includeConcerts=1&includePreferences=1', 'listType': 'video', 'addedAt': datetime.datetime(2020, 4, 15, 14, 7, 44), 'key': '/library/metadata/3568', 'lastViewedAt': None, 'librarySectionID': None, 'ratingKey': 3568, 'summary': 'Larry kicks off the new year with a new rival – Mocha Joe. Later, at a cocktail party hosted by Jeff and Susie, Larry gets roped into lunch plans and has a misunderstanding with a caterer.', 'thumb': '/library/metadata/3568/thumb/1586989710', 'title': 'Happy New Year', 'titleSort': 'Happy New Year', 'type': 'episode', 'updatedAt': datetime.datetime(2020, 4, 15, 17, 28, 30), 'viewCount': 0, 'sessionKey': None, 'usernames': [], 'players': [], 'transcodeSessions': [], 'session': [], 'viewedAt': None, 'accountID': None, 'playlistItemID': None, '_seasonNumber': '10', 'art': '/library/metadata/3566/art/1586989712', 'chapterSource': None, 'contentRating': 'TV-MA', 'duration': 2247804, 'grandparentArt': '/library/metadata/3566/art/1586989712', 'grandparentKey': '/library/metadata/3566', 'grandparentRatingKey': 3566, 'grandparentTheme': '/library/metadata/3566/theme/1586989712', 'grandparentThumb': '/library/metadata/3566/thumb/1586989712', 'grandparentTitle': 'Curb Your Enthusiasm', 'guid': 'com.plexapp.agents.thetvdb://76203/10/1?lang=en', 'index': 1, 'originallyAvailableAt': datetime.datetime(2020, 1, 19, 0, 0), 'parentIndex': '10', 'parentKey': '/library/metadata/3567', 'parentRatingKey': 3567, 'parentThumb': '/library/metadata/3567/thumb/1586989712', 'parentTitle': 'Season 10', 'rating': None, 'viewOffset': 0, 'year': 2020, 'directors': [], 'media': [<Media:4070>], 'writers': [], 'labels': [], 'collections': [], 'chapters': [], 'markers': []}