Error listing directory '/directory name)'

hi I am getting the an error message when trying to connect to FTP implicit saying
Transfer channel can't be opened. reason: No connection could be made because the target machine actively refused it.
couldn't retrieve directory listing
time out detected. (control connection)

will you be able to advice please

It's probably some NAT/firewall issue.
Please read:
https://winscp.net/eng/docs/ftp_modes

More information about "Transfer channel can't be opened" error:
https://winscp.net/eng/docs/message_transfer_channel_cant_be_opened