Connecting Calibre on Mac to Poke 3

So Calibre recognizes that Poke 3 is connected but when I try to transfer a book I get an error with the following message:

calibre, version 5.9.0
ERROR: Error: Error communicating with device

'str' object has no attribute 'decode'

Traceback (most recent call last):
File "calibre/gui2/device.py", line 89, in run
File "calibre/gui2/device.py", line 592, in _upload_books
File "calibre/devices/mtp/driver.py", line 429, in upload_books
File "calibre/devices/mtp/driver.py", line 405, in ensure_parent
File "calibre/devices/mtp/base.py", line 25, in synchronizer
File "calibre/devices/mtp/unix/driver.py", line 380, in create_folder
File "calibre/devices/mtp/unix/driver.py", line 209, in format_errorstack
File "calibre/devices/mtp/unix/driver.py", line 209, in <listcomp>
AttributeError: 'str' object has no attribute 'decode'



Any help in resolving this would be greatly appreciated.