Can't Open .epub Files

[Mindforms]

I run Kubuntu 19.10. Not only am I unable to open .pdf files as I can't install pymupdf (which isn't a big deal because I already have a good PDF reader), but most importantly, I can't open .epub files either.

Here's my log when I try opening one:

2020/09/08  15:41:07,896 lector.readers.read_epub WARNING toc.ncx not found in /home/aeonwaves/Downloads/~~~Reading~~~/eBooks - Selection/BOOK.epub
2020/09/08  15:41:07,900 lector.sorter ERROR Content generation error: /home/aeonwaves/Downloads/~~~Reading~~~/eBooks - Selection/BOOK.epub KeyError Arguments: ('ncx',)
Traceback (most recent call last):
  File "/home/aeonwaves/Downloads/~~~Software~~~/Lector/Lector/lector/sorter.py", line 290, in read_book
    book_breakdown = book_ref.generate_content()
  File "/home/aeonwaves/Downloads/~~~Software~~~/Lector/Lector/lector/parsers/epub.py", line 46, in generate_content
    self.book.generate_toc()
  File "/home/aeonwaves/Downloads/~~~Software~~~/Lector/Lector/lector/readers/read_epub.py", line 151, in generate_toc
    navpoints = toc_dict['ncx']['navMap']['navPoint']
KeyError: 'ncx'
2020/09/08  15:41:07,953 lector.main ERROR No parseable files found

[char101]

BeautifulSoup cannot parse None so we need to handle the case

diff --git a/lector/readers/read_epub.py b/lector/readers/read_epub.py
index 124e8e5..55d9619 100644
--- a/lector/readers/read_epub.py
+++ b/lector/readers/read_epub.py
@@ -193,7 +193,7 @@ class EPUB:
             self.split_chapters[chapter_file] = {}

             chapter_content = self.get_chapter_content(chapter_file)
-            soup = BeautifulSoup(chapter_content, 'lxml')
+            soup = BeautifulSoup(chapter_content or '', 'lxml')

             split_anchors = i[1]
             for this_anchor in reversed(split_anchors):