> 2018-03-23 13:51:54.583 PASV
< 2018-03-23 13:51:54.611 502 Command not implemented
. 2018-03-23 13:51:54.611 Could not retrieve directory listing
You have to configure WinSCP to use an active mode (= not to use a passive mode):
On my side, it was caused by an invalid caracter "?" shown in a filename.
Throuhg an ssh connection I removed this caracter (mv filename? filename) and the problem was solved