Traceback (most recent call last):


 "calibre_plugins.dedrm.ignobleepub", line 281, in decryptBook


 "calibre_plugins.dedrm.ignobleepub", line 212, in __init__


 "calibre_plugins.dedrm.ignobleepub", line 183, in __init__


 "site-packages\Crypto\Cipher\AES.py", line 95, in new


 "site-packages\Crypto\Cipher\AES.py", line 59, in __init__


 "site-packages\Crypto\Cipher\blockalgo.py", line 141, in __init__
ValueError: Key cannot be the null string


Traceback (most recent call last):

 "tornado/simple_httpclient.py", line 225, in cleanup

 "tornado/stack_context.py", line 171, in wrapped

 "tornado/simple_httpclient.py", line 258, in _on_headers
ValueError: invalid literal for int() with base 10: '28760,28760'