can't get this to work

[johndpope]

scribdl -i -c cred.txt https://www.scribd.com/book/272741038/Michael-Buble-Let-It-Snow --pdf
(base) ➜ scribd-downloader git:(master) ✗ scribdl -i -c cred.txt https://www.scribd.com/book/272741038/Michael-Buble-Let-It-Snow --pdf

Converting to Michael_Bublé_-_Let_It_Snow.pdf..
Traceback (most recent call last):
File "/Users/admin/miniconda3/bin/scribdl", line 11, in
load_entry_point('scribd-downloader==1.3.1', 'console_scripts', 'scribdl')()
File "/Users/admin/miniconda3/lib/python3.7/site-packages/scribd_downloader-1.3.1-py3.7.egg/scribdl/command_line.py", line 57, in _command_line
File "/Users/admin/miniconda3/lib/python3.7/site-packages/scribd_downloader-1.3.1-py3.7.egg/scribdl/pdf_converter.py", line 29, in to_pdf
File "/Users/admin/miniconda3/lib/python3.7/site-packages/scribd_downloader-1.3.1-py3.7.egg/scribdl/pdf_converter.py", line 47, in _images_to_pdf
File "/Users/admin/miniconda3/lib/python3.7/site-packages/img2pdf-0.4.0-py3.7.egg/img2pdf.py", line 2084, in convert
File "/Users/admin/miniconda3/lib/python3.7/site-packages/img2pdf-0.4.0-py3.7.egg/img2pdf.py", line 955, in tostring
File "/Users/admin/miniconda3/lib/python3.7/site-packages/img2pdf-0.4.0-py3.7.egg/img2pdf.py", line 1049, in tostream
IndexError: Accessing nonexistent PDF page number
(base) ➜ scribd-downloader git:(master) ✗ l