Error Every Single time I run the File

[jash-kothari]

User and password have been saved to coursera.pass file.
Please delete the file if you want to change your credentials.

Traceback (most recent call last):
File "www-coursera-downloader.py", line 748, in
main()
File "www-coursera-downloader.py", line 734, in main
email, password = getUserPass("coursera.pass")
File "www-coursera-downloader.py", line 154, in getUserPass
decryptedText = decrypt(strText, key1, key2)
File "www-coursera-downloader.py", line 116, in decrypt
decryptedText = obj2.decrypt(strInput)
File "C:\Users\Jash\Miniconda2\lib\site-packages\Crypto\Cipher\blockalgo.py",
line 295, in decrypt
return self._cipher.decrypt(ciphertext)
ValueError: Input strings must be a multiple of 16 in length

[jash-kothari]

It is a Windows based PC running miniconda2