Barrons fetch fails, both current and past issue

[nano5]

calibre, version 7.17.0 (darwin, embedded-python: True)
Conversion error: Failed: Fetch news from Barron's Magazine

Fetch news from Barron's Magazine
Conversion options changed from defaults:
  verbose: 2
  output_profile: 'generic_eink_hd'
  base_font_size: 13.0
  recipe_specific_option: ['date:20240108']
  keep_ligatures: True
Resolved conversion options
calibre version: 7.17.0
{'add_alt_text_to_img': False,
 'asciiize': False,
 'author_sort': None,
 'authors': None,
 'base_font_size': 13.0,
 '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_max_image_size': 'none',
 '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 0x110086a10>,
 'insert_blank_line': False,
 'insert_blank_line_size': 0.5,
 'insert_metadata': False,
 'isbn': None,
 'italicize_common_cases': True,
 'keep_ligatures': True,
 '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.GenericEinkHD object at 0x1100ba490>,
 '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,
 'recipe_specific_option': ['date:20240108'],
 '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:barrons
Trying to get latest version of recipe: barrons
Using proxies: {'http': '127.0.0.1:7897', 'https': '127.0.0.1:7897'}
Using user agent: Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)
Using proxies: {'http': '127.0.0.1:7897', 'https': '127.0.0.1:7897'}
Recipe specific options:
  date = 20240108

***
if this recipe fails, report it on: https://www.mobileread.com/forums/forumdisplay.php?f=228
***

Traceback (most recent call last):
  File "runpy.py", line 198, in _run_module_as_main
  File "runpy.py", line 88, in _run_code
  File "site.py", line 42, in <module>
  File "site.py", line 38, 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 1129, in run
  File "calibre/customize/conversion.py", line 245, in __call__
  File "calibre/ebooks/conversion/plugins/recipe_input.py", line 155, in convert
  File "calibre/web/feeds/news.py", line 1120, in download
  File "calibre/web/feeds/news.py", line 1299, in build_index
  File "<string>", line 100, in parse_index
AttributeError: 'NoneType' object has no attribute 'find'

[unkn0wn]

it still works! The website is a bit sensitive to bots.. use only once in a while.

[nano5]

I use brew upgrade to get the latest calibre 7.17, could this be the reason for such difference? Tried again, and the Barrons recipe fails to fetch, then I use a custom recipe to fetch an issue using command line with success, and the same custom recipe still fails when using calibre "Fetch News" button.