Indeed, I was running an old version. I upgraded to 0.8.68 and now this is the error I get;
Code:
Traceback (most recent call last):
File "site.py", line 58, in main
File "site-packages/calibre/ebooks/conversion/cli.py", line 325, in main
File "site-packages/calibre/ebooks/conversion/plumber.py", line 989, in run
File "site-packages/calibre/customize/conversion.py", line 239, in __call__
File "site-packages/calibre/ebooks/conversion/plugins/epub_input.py", line 154, in convert
File "site-packages/calibre/utils/zipfile.py", line 1087, in extractall
File "site-packages/calibre/utils/zipfile.py", line 1071, in extract
File "site-packages/calibre/utils/zipfile.py", line 1140, in _extract_member
File "shutil.py", line 49, in copyfileobj
File "site-packages/calibre/utils/zipfile.py", line 607, in read
File "site-packages/calibre/utils/zipfile.py", line 659, in read1
error: Error -3 while decompressing: invalid stored block lengths