Pseudo-class:visited is not supported

[Stuart Flicker]

I am running Calibre 2.21 64 bit and 32 bit on Windows 7. The following conversion error documents failure to convert a book from AZW3 to either EPUB or MOBI formats.

Thank-you.

calibre, version 2.21.0 (win32, isfrozen: True)
Conversion Error: Failed: Convert book 1 of 1 (The Lyra Novels: Shadow Magic, Daughter of Witches, The Harp of Imach Thyssel, Caught in Crystal, and The Raven Ring)

Convert book 1 of 1 (The Lyra Novels: Shadow Magic, Daughter of Witches, The Harp of Imach Thyssel, Caught in Crystal, and The Raven Ring)
Resolved conversion options
calibre version: 2.21.0
{'asciiize': False,
 'author_sort': None,
 'authors': None,
 'base_font_size': 0.0,
 'book_producer': None,
 'change_justification': u'original',
 'chapter': u"//*[((name()='h1' or name()='h2') and re:test(., '\\s*((chapter|book|section|part)\\s+)|((prolog|prologue|epilogue)(\\s+|$))', 'i')) or @class = 'chapter']",
 'chapter_mark': u'pagebreak',
 'comments': None,
 'cover': u'G:\\temp\\WINDOW~1\\Dawn\\calibre_jztvp2\\lx5fqu.jpeg',
 'debug_pipeline': None,
 'dehyphenate': True,
 'delete_blank_paragraphs': True,
 'disable_font_rescaling': False,
 'dont_split_on_page_breaks': False,
 '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,
 'expand_css': False,
 'extra_css': None,
 'extract_to': None,
 'filter_css': u'',
 'fix_indents': True,
 'flow_size': 4096,
 'font_size_mapping': None,
 'format_scene_breaks': True,
 'html_unwrap_factor': 0.4,
 'input_encoding': None,
 'input_profile': <calibre.customize.profiles.InputProfile object at 0x0427E1D0>,
 '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': 0.0,
 'linearize_tables': 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.SonyReaderOutput object at 0x0427E6F0>,
 'page_breaks_before': u"//*[name()='h1' or name()='h2']",
 'prefer_metadata_cover': False,
 'preserve_cover_aspect_ratio': False,
 'pretty_print': True,
 'pubdate': None,
 'publisher': None,
 'rating': None,
 'read_metadata_from_opf': u'G:\\temp\\WINDOW~1\\Dawn\\calibre_jztvp2\\hofdjm.opf',
 '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': u'',
 'search_replace': '[]',
 'series': None,
 'series_index': None,
 'smarten_punctuation': False,
 'sr1_replace': None,
 'sr1_search': None,
 'sr2_replace': None,
 'sr2_search': None,
 'sr3_replace': None,
 'sr3_search': None,
 'start_reading_at': None,
 'subset_embedded_fonts': False,
 'tags': None,
 'timestamp': None,
 'title': None,
 'title_sort': None,
 'toc_filter': None,
 'toc_threshold': 6,
 'toc_title': None,
 'unsmarten_punctuation': False,
 'unwrap_lines': True,
 'use_auto_toc': False,
 'verbose': 2}
InputFormatPlugin: MOBI Input running
on G:\temp\WINDOW~1\Dawn\calibre_jztvp2\jsvxvz.azw3
Found KF8 MOBI of type 'standalone'
Extracting text...
Parsing all content...
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Reading TOC from NCX...
Merging user specified metadata...
Detecting structure...
 Detected chapter: Chapter 1
 Detected chapter: Chapter 2
 Detected chapter: Chapter 3
 Detected chapter: Chapter 4
 Detected chapter: Chapter 5
 Detected chapter: Chapter 6
 Detected chapter: Chapter 7
 Detected chapter: Chapter 8
 Detected chapter: Chapter 9
 Detected chapter: Chapter 10
 Detected chapter: Chapter 11
 Detected chapter: Chapter 12
 Detected chapter: Chapter 13
 Detected chapter: Chapter 14
 Detected chapter: Chapter 15
 Detected chapter: Chapter 16
 Detected chapter: Chapter 17
 Detected chapter: Chapter 18
 Detected chapter: Chapter 19
 Detected chapter: Chapter 20
 Detected chapter: Chapter 21
 Detected chapter: Chapter 22
 Detected chapter: Chapter 23
 Detected chapter: Chapter 24
 Detected chapter: Epilogue
 Detected chapter: Chapter 1
 Detected chapter: Chapter 2
 Detected chapter: Chapter 3
 Detected chapter: Chapter 4
 Detected chapter: Chapter 5
 Detected chapter: Chapter 6
 Detected chapter: Chapter 7
 Detected chapter: Chapter 8
 Detected chapter: Chapter 9
 Detected chapter: Chapter 10
 Detected chapter: Chapter 11
 Detected chapter: Chapter 12
 Detected chapter: Chapter 13
 Detected chapter: Chapter 14
 Detected chapter: Chapter 15
 Detected chapter: Chapter 16
 Detected chapter: Chapter 17
 Detected chapter: Chapter 18
 Detected chapter: Chapter 19
 Detected chapter: Chapter 20
 Detected chapter: Chapter 21
 Detected chapter: Chapter 22
 Detected chapter: Chapter 23
 Detected chapter: Chapter 24
 Detected chapter: Chapter 1
 Detected chapter: Chapter 2
 Detected chapter: Chapter 3
 Detected chapter: Chapter 4
 Detected chapter: Chapter 5
 Detected chapter: Chapter 6
 Detected chapter: Chapter 7
 Detected chapter: Chapter 8
 Detected chapter: Chapter 9
 Detected chapter: Chapter 10
 Detected chapter: Chapter 11
 Detected chapter: Chapter 12
 Detected chapter: Chapter 13
 Detected chapter: Chapter 14
 Detected chapter: Chapter 15
 Detected chapter: Chapter 16
 Detected chapter: Chapter 17
 Detected chapter: Chapter 18
 Detected chapter: Chapter 19
 Detected chapter: Chapter 20
 Detected chapter: Chapter 21
 Detected chapter: Chapter 22
 Detected chapter: Chapter 23
 Detected chapter: Chapter 24
 Detected chapter: Chapter 25
 Detected chapter: PROLOGUE
 Detected chapter: PART IHearth and Sword
 Detected chapter: PART IISisterhood of Stars
 Detected chapter: PART IIIThe Twisted Tower
 Detected chapter: PROLOGUE
Flattening CSS and remapping font sizes...
Python function terminated unexpectedly
  The pseudo-class :visted is not supported (Error Code: 1)
Traceback (most recent call last):
  File "site.py", line 132, in main
  File "site.py", line 109, in run_entry_point
  File "site-packages\calibre\utils\ipc\worker.py", line 193, in main
  File "site-packages\calibre\gui2\convert\gui_conversion.py", line 31, in gui_convert_override
  File "site-packages\calibre\gui2\convert\gui_conversion.py", line 25, in gui_convert
  File "site-packages\calibre\ebooks\conversion\plumber.py", line 1155, in run
  File "site-packages\calibre\ebooks\oeb\transforms\flatcss.py", line 185, in __call__
  File "site-packages\calibre\ebooks\oeb\transforms\flatcss.py", line 264, in stylize_spine
  File "site-packages\calibre\ebooks\oeb\stylizer.py", line 220, in __init__
  File "site-packages\css_selectors\select.py", line 177, in __call__
  File "site-packages\css_selectors\select.py", line 195, in iterparsedselector
  File "site-packages\css_selectors\select.py", line 332, in select_combinedselector
  File "site-packages\css_selectors\select.py", line 337, in select_descendant
  File "site-packages\css_selectors\select.py", line 195, in iterparsedselector
  File "site-packages\css_selectors\select.py", line 553, in select_pseudo
css_selectors.errors.ExpressionError: The pseudo-class :visted is not supported