problem converting epub to mobi

[STEPHANE MONTBRIZON]

I have the following error converting epub to mobi. Thank for your support.

windows 10

calibre, version 3.33.1 (win32, embedded-python: True)
Erreur lors de la conversion: Échoué: Conversion du livre 1 sur 1 (Find Your Next: Using the Business Genome Approach to Find Your Company’s Next Competitive Edge)

Conversion du livre 1 sur 1 (Find Your Next: Using the Business Genome Approach to Find Your Company’s Next Competitive Edge)
C:\Program Files (x86)\Calibre2\app\pylib.zip\dateutil\parser.py:601: UnicodeWarning: Unicode equal comparison failed to convert both arguments to Unicode - interpreting them as being unequal
Conversion options changed from defaults:
  cover: u'C:\\Users\\Stephane\\AppData\\Local\\Temp\\calibre_urtn0g\\gy46x6.jpeg'
  verbose: 2
  read_metadata_from_opf: u'C:\\Users\\Stephane\\AppData\\Local\\Temp\\calibre_urtn0g\\f_opbz.opf'
  output_profile: 'kindle_pw3'
Resolved conversion options
calibre version: 3.33.1
{'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'C:\\Users\\Stephane\\AppData\\Local\\Temp\\calibre_urtn0g\\gy46x6.jpeg',
 'debug_pipeline': None,
 'dehyphenate': True,
 'delete_blank_paragraphs': True,
 'disable_font_rescaling': False,
 'dont_compress': False,
 'duplicate_links_in_toc': False,
 'embed_all_fonts': False,
 'embed_font_family': None,
 'enable_heuristics': False,
 'expand_css': False,
 'extra_css': None,
 'extract_to': None,
 'filter_css': u'',
 'fix_indents': True,
 'font_size_mapping': None,
 'format_scene_breaks': True,
 'html_unwrap_factor': 0.4,
 'input_encoding': None,
 'input_profile': <calibre.customize.profiles.InputProfile object at 0x05AB2C10>,
 '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,
 'mobi_file_type': u'old',
 'mobi_ignore_margins': False,
 'mobi_keep_original_images': False,
 'mobi_toc_at_start': False,
 'no_chapters_in_toc': False,
 'no_inline_navbars': True,
 'no_inline_toc': False,
 'output_profile': <calibre.customize.profiles.KindlePaperWhite3Output object at 0x05B65030>,
 'page_breaks_before': u'/',
 'personal_doc': u'[PDOC]',
 'prefer_author_sort': False,
 'prefer_metadata_cover': False,
 'pretty_print': False,
 'pubdate': None,
 'publisher': None,
 'rating': None,
 'read_metadata_from_opf': u'C:\\Users\\Stephane\\AppData\\Local\\Temp\\calibre_urtn0g\\f_opbz.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,
 'share_not_sync': False,
 '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,
 'transform_css_rules': '[]',
 'unsmarten_punctuation': False,
 'unwrap_lines': True,
 'use_auto_toc': False,
 'verbose': 2}
InputFormatPlugin: EPUB Input running
on C:\Users\Stephane\AppData\Local\Temp\calibre_urtn0g\bv4oaq.epub
Failed to parse as XML, parsing as tag soup
Traceback (most recent call last):
  File "site-packages\calibre\ebooks\oeb\polish\parsing.py", line 94, in parse
ValueError: Root tag is not <html> in the XHTML namespace

Parsing all content...
Parsing part02.xhtml ...
Parsing part01.xhtml ...
Parsing fm01.xhtml ...
Parsing index.xhtml ...
Parsing intro.xhtml ...
Parsing 0071778543.css ...
Parsing ack.xhtml ...
Parsing back.xhtml ...
Parsing biblio.xhtml ...
Parsing cover.xhtml ...
Parsing ch01.xhtml ...
Parsing ch02.xhtml ...
Parsing ch04.xhtml ...
Parsing ch03.xhtml ...
Parsing ch07.xhtml ...
Parsing ch06.xhtml ...
Parsing ch05.xhtml ...
Parsing ch08.xhtml ...
Parsing ch10.xhtml ...
Parsing ch11.xhtml ...
Parsing ch09.xhtml ...
Parsing ch10a.xhtml ...
Parsing ch12.xhtml ...
Parsing part03.xhtml ...
Parsing conclu.xhtml ...
Parsing content.xhtml ...
Parsing crpage.xhtml ...
Parsing title.xhtml ...
Parsing toc.xhtml ...
Parsing fore.xhtml ...
Reading TOC from HTML...
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Found image encoded as data URI converting it to normal image
Merging user specified metadata...
Detecting structure...
 Detected chapter: Part 1THE BUSINESS GENOME APPROACH
 Detected chapter: Part 2THE BUSINESS GENOME ELEMENTS
 Detected chapter: Part 3CASE STUDIES
Flattening CSS and remapping font sizes...
Python function terminated unexpectedly
  'NoneType' object has no attribute 'get' (Error Code: 1)
Traceback (most recent call last):
  File "site.py", line 101, in main
  File "site.py", line 78, in run_entry_point
  File "site-packages\calibre\utils\ipc\worker.py", line 199, in main
  File "site-packages\calibre\gui2\convert\gui_conversion.py", line 42, in gui_convert_override
  File "site-packages\calibre\gui2\convert\gui_conversion.py", line 27, in gui_convert
  File "site-packages\calibre\ebooks\conversion\plumber.py", line 1227, in run
  File "site-packages\calibre\ebooks\oeb\transforms\flatcss.py", line 215, in __call__
  File "site-packages\calibre\ebooks\oeb\transforms\flatcss.py", line 297, in stylize_spine
AttributeError: 'NoneType' object has no attribute 'get'