Can't convert - "No module named 'Crypto'

Added A Great and Terrible King: Edward I and the Forging of Britain to db in: 0.1
Added 1 books in 0.7 seconds
Worker Launch took: 0.02 seconds
Job: 1 Convert book 1 of 1 (A Great and Terrible King: Edward I and the Forging of Britain) finished
Convert book 1 of 1 (A Great and Terrible King: Edward I and the Forging of Britain)
        DeDRM v7.2.1: Trying to decrypt m_aa8uz0.azw3
        Using Library AlfCrypto DLL/DYLIB/SO
        Using Library AlfCrypto DLL/DYLIB/SO
        Running file type plugin DeDRM failed with traceback:
        Traceback (most recent call last):
          File "calibre_plugins.dedrm.kfxdedrm", line 18, in <module>
            from ion import DrmIon, DrmIonVoucher
          File "/tmp/calibre_5.37.0_tmp_949uicag/pa9a4it9plugin_unzip/ion.py", line 33, in <module>
            from Crypto.Cipher import AES
        ModuleNotFoundError: No module named 'Crypto'

        During handling of the above exception, another exception occurred:

        Traceback (most recent call last):
          File "/usr/lib/calibre/calibre/customize/ui.py", line 175, in _run_filetype_plugins
            nfp = plugin.run(nfp) or nfp
          File "calibre_plugins.dedrm.__init__", line 633, in run
            decrypted_ebook = self.KindleMobiDecrypt(path_to_ebook)
          File "calibre_plugins.dedrm.__init__", line 527, in KindleMobiDecrypt
            import calibre_plugins.dedrm.k4mobidedrm
          File "/usr/lib/calibre/calibre/customize/zipplugin.py", line 191, in exec_module
            exec(compiled, module.__dict__)
          File "calibre_plugins.dedrm.k4mobidedrm", line 88, in <module>
            from calibre_plugins.dedrm import kfxdedrm
          File "/usr/lib/calibre/calibre/customize/zipplugin.py", line 191, in exec_module
            exec(compiled, module.__dict__)
          File "calibre_plugins.dedrm.kfxdedrm", line 20, in <module>
            from calibre_plugins.dedrm.ion import DrmIon, DrmIonVoucher
          File "/usr/lib/calibre/calibre/customize/zipplugin.py", line 191, in exec_module
            exec(compiled, module.__dict__)
          File "calibre_plugins.dedrm.ion", line 33, in <module>
            from Crypto.Cipher import AES
        ModuleNotFoundError: No module named 'Crypto'
        Conversion options changed from defaults:
          cover: '/tmp/calibre_5.37.0_tmp_949uicag/32ipieio.jpeg'
          pdf_sans_family: 'Nimbus Sans [urw]'
          output_profile: 'kindle_voyage'
          verbose: 2
          read_metadata_from_opf: '/tmp/calibre_5.37.0_tmp_949uicag/_vr_woxy.opf'
          pdf_serif_family: 'Nimbus Roman [urw]'
        Resolved conversion options
        calibre version: 5.37.0
        {'asciiize': False,
         'author_sort': None,
         'authors': None,
         'base_font_size': 0.0,
         'book_producer': None,
         'change_justification': 'original',
         'chapter': "//*[((name()='h1' or name()='h2') and re:test(., "
                    "'\\s*((chapter|book|section|part)\\s+)|((prolog|prologue|epilogue)(\\s+|$))', "
                    "'i')) or @class = 'chapter']",
         'chapter_mark': 'pagebreak',
         'comments': None,
         'cover': '/tmp/calibre_5.37.0_tmp_949uicag/32ipieio.jpeg',
         'custom_size': None,
         'debug_pipeline': None,
         'dehyphenate': True,
         'delete_blank_paragraphs': True,
         'disable_font_rescaling': False,
         'duplicate_links_in_toc': False,
         'embed_all_fonts': False,
         'embed_font_family': None,
         'enable_heuristics': False,
         'expand_css': False,
         'extra_css': None,
         'filter_css': '',
         '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 0x7f632823eef0>,
         '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_inline_navbars': False,
         'output_profile': <calibre.customize.profiles.KindleVoyageOutput object at 0x7f632823f9a0>,
         'page_breaks_before': "//*[name()='h1' or name()='h2']",
         'paper_size': 'letter',
         'pdf_add_toc': False,
         'pdf_default_font_size': 20,
         'pdf_footer_template': None,
         'pdf_header_template': None,
         'pdf_hyphenate': False,
         'pdf_mark_links': False,
         'pdf_mono_family': 'Courier',
         'pdf_mono_font_size': 16,
         'pdf_odd_even_offset': 0.0,
         'pdf_page_margin_bottom': 72.0,
         'pdf_page_margin_left': 72.0,
         'pdf_page_margin_right': 72.0,
         'pdf_page_margin_top': 72.0,
         'pdf_page_number_map': None,
         'pdf_page_numbers': False,
         'pdf_sans_family': 'Nimbus Sans [urw]',
         'pdf_serif_family': 'Nimbus Roman [urw]',
         'pdf_standard_font': 'serif',
         'pdf_use_document_margins': False,
         'prefer_metadata_cover': False,
         'preserve_cover_aspect_ratio': False,
         'pretty_print': False,
         'pubdate': None,
         'publisher': None,
         'rating': None,
         'read_metadata_from_opf': '/tmp/calibre_5.37.0_tmp_949uicag/_vr_woxy.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': '',
         '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,
         'transform_css_rules': '[]',
         'transform_html_rules': '[]',
         'uncompressed_pdf': False,
         'unit': 'inch',
         'unsmarten_punctuation': False,
         'unwrap_lines': True,
         'use_auto_toc': False,
         'use_profile_size': False,
         'verbose': 2}
        DeDRM v7.2.1: Trying to decrypt m_aa8uz0.azw3
        Running file type plugin DeDRM failed with traceback:
        Traceback (most recent call last):
          File "calibre_plugins.dedrm.kfxdedrm", line 18, in <module>
            from ion import DrmIon, DrmIonVoucher
          File "/tmp/calibre_5.37.0_tmp_949uicag/_qdhjpmxplugin_unzip/ion.py", line 33, in <module>
            from Crypto.Cipher import AES
        ModuleNotFoundError: No module named 'Crypto'