looks like the server you are working with doesn't understand the MLSD command, which is very silly as it is a two year old standard
.. Other than contacting the server admin to see if their server is up to date, I would check any local firewalls to see if it is somehow blocking the updated FZclient from connecting out.
_________________Network Config Guide
(setup & connection issues)FileZilla wiki
(FAQs, screenshots, & "got logs?"
info:) FTP server test
(plain), FTP(E)S server test
(see also List_of_FTP_server_return_codes