Sync Calibre - KOReader on Kindle not working

Hello,

I have the server set up and functioning in Calibre. KOReader connects to the server and my Kindle Basic 2019 shows up in Calibre.

When I try to transfer books I get:

[Errno 2] No such file or directory: '/Volumes/Kindle/'

Traceback (most recent call last):
File "calibre/gui2/device.py", line 111, in run
File "calibre/gui2/device.py", line 662, in _upload_books
File "calibre/devices/usbms/driver.py", line 319, in upload_books
File "calibre/devices/usbms/device.py", line 965, in _sanity_check
File "calibre/devices/usbms/device.py", line 226, in free_space
FileNotFoundError: [Errno 2] No such file or directory: '/Volumes/Kindle/'

Transfers over usb work just fine.

Any ideas how I can fix this?

Thank you!