Smithsonian recipe not working

[scottsan]

a solution would be greatly appreciated.

calibre, version 5.38.0 (darwin, embedded-python: True)
Conversion error: Failed: Fetch news from Smithsonian Magazine

Fetch news from Smithsonian Magazine
Conversion options changed from defaults:
verbose: 2
Resolved conversion options
calibre version: 5.38.0
{'asciiize': False,
'author_sort': None,
'authors': None,
'base_font_size': 0,
'book_producer': None,
'change_justification': 'original',
'chapter': None,
'chapter_mark': 'pagebreak',
'comments': None,
'cover': None,
'debug_pipeline': None,
'dehyphenate': True,
'delete_blank_paragraphs': True,
'disable_font_rescaling': False,
'dont_download_recipe': False,
'dont_split_on_page_breaks': True,
'duplicate_links_in_toc': False,
'embed_all_fonts': False,
'embed_font_family': None,
'enable_heuristics': False,
'epub_flatten': False,
'epub_inline_toc': False,
'epub_toc_at_end': False,
'epub_version': '2',
'expand_css': False,
'extra_css': None,
'extract_to': None,
'filter_css': None,
'fix_indents': True,
'flow_size': 260,
'font_size_mapping': None,
'format_scene_breaks': True,
'html_unwrap_factor': 0.4,
'input_encoding': None,
'input_profile': <calibre.customize.profiles.InputProfile object at 0x110448250>,
'insert_blank_line': False,
'insert_blank_line_size': 0.5,
'insert_metadata': False,
'isbn': None,
'italicize_common_cases': True,
'keep_ligatures': False,
'language': None,
'level1_toc': None,
'level2_toc': None,
'level3_toc': None,
'line_height': 0,
'linearize_tables': False,
'lrf': False,
'margin_bottom': 5.0,
'margin_left': 5.0,
'margin_right': 5.0,
'margin_top': 5.0,
'markup_chapter_headings': True,
'max_toc_links': 50,
'minimum_line_height': 120.0,
'no_chapters_in_toc': False,
'no_default_epub_cover': False,
'no_inline_navbars': False,
'no_svg_cover': False,
'output_profile': <calibre.customize.profiles.OutputProfile object at 0x110448520>,
'page_breaks_before': None,
'prefer_metadata_cover': False,
'preserve_cover_aspect_ratio': False,
'pretty_print': True,
'pubdate': None,
'publisher': None,
'rating': None,
'read_metadata_from_opf': None,
'remove_fake_margins': True,
'remove_first_image': False,
'remove_paragraph_spacing': False,
'remove_paragraph_spacing_indent_size': 1.5,
'renumber_headings': True,
'replace_scene_breaks': '',
'search_replace': None,
'series': None,
'series_index': None,
'smarten_punctuation': False,
'sr1_replace': '',
'sr1_search': '',
'sr2_replace': '',
'sr2_search': '',
'sr3_replace': '',
'sr3_search': '',
'start_reading_at': None,
'subset_embedded_fonts': False,
'tags': None,
'test': False,
'timestamp': None,
'title': None,
'title_sort': None,
'toc_filter': None,
'toc_threshold': 6,
'toc_title': None,
'transform_css_rules': None,
'transform_html_rules': None,
'unsmarten_punctuation': False,
'unwrap_lines': True,
'use_auto_toc': False,
'verbose': 2}
InputFormatPlugin: Recipe Input running
Downloading recipe urn: builtin:smith
Trying to get latest version of recipe: smith
Using user agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.87 Safari/537.36
Parsing section: Smart News
Explore the Mysteries of Stonehenge at the British Museum
Unesco Sounds the Alarm Over Threats to Ukrainian Cultural Heritage
Silkworms Fed Quantum Dots Shine Bright Under Ultraviolet Light, Produce Florescent Red Silk
How Sanctions on Russia Affect International Space Programs
Endangered Shark Meat Might Be Hiding in Your Pet's Food
Here Are the World's 25 Most Endangered Cultural Heritage Sites
Invasive Insect Gets a New Name: Spongy Moth
First Possible Case of Covid-19 Spreading From Deer to Humans
At 85 Years Old, Longtime Detroit Artist Gets a Show of Her Own
Fossils Help Scientists Identify a 'Lost' Continent
Scientists Will Study the Effects of Microgravity on Skin at the International Space Station
Ukrainian Officials Say the World's Largest Aircraft, Antonov AN-225, Has Been Destroyed
Your Kitchen Sponge Is a Better Home for Bacteria Than a Petri Dish
Why a New T. Rex Study Is Riling Up the Paleontology World
These Ancient Egyptian Artifacts Reveal New Details on the Mummification Process
To Protect Bighorn Sheep, Authorities Kill 58 Mountain Goats in Grand Teton National Park
Breast Cancer May Not Be as Overdiagnosed as Previously Thought
Europe's Mars Rover Unlikely to Launch in 2022 Due to Russian Invasion
Parsing section: History
Inside the Last Journey of the 'Carnegie'
For 50 Years, Dogsled Teams Have Been Testing Their Mettle at the Iditarod
Before the Riddler, Batman's Archenemy Was Hitler
Tearing Down the Barriers for Black Inventors Begins With Honoring Their Historic Breakthroughs
How Sitting Bull's Fight for Indigenous Land Rights Shaped the Creation of Yellowstone National Park
Chronicling the Triumphs—and Tragedies—of Life in the Deep South
Women Who Shaped History
The Black Record Label That Introduced the Beatles to America
Race in America
In the Florida Keys, a Century-Old Bridge Reopens as a Tropical High Line
In Search of Troy
Polaroid Inventor Edwin Land Gave Us More Than Just Instant Photos
Parsing section: Science
Traceback (most recent call last):
File "runpy.py", line 194, in _run_module_as_main
File "runpy.py", line 87, in _run_code
File "site.py", line 39, in <module>
File "site.py", line 35, in main
File "calibre/utils/ipc/worker.py", line 215, in main
File "calibre/gui2/convert/gui_conversion.py", line 31, in gui_convert_recipe
File "calibre/gui2/convert/gui_conversion.py", line 25, in gui_convert
File "calibre/ebooks/conversion/plumber.py", line 1108, in run
File "calibre/customize/conversion.py", line 242, in __call__
File "calibre/ebooks/conversion/plugins/recipe_input.py", line 137, in convert
File "calibre/web/feeds/news.py", line 1056, in download
File "calibre/web/feeds/news.py", line 1225, in build_index
File "<string>", line 62, in parse_index
File "<string>", line 37, in parse_section
File "calibre/web/feeds/news.py", line 706, in index_to_soup
File "mechanize/_mechanize.py", line 241, in open_novisit
File "mechanize/_mechanize.py", line 313, in _mech_open
mechanize._response.httperror_seek_wrapper: HTTP Error 404: Not Found