FTP connection issue

We want to connect Veeva Vault FTP according to:
https://general.veevavault.dev/vault-api/guides/file-staging/legacyftp
We're using WinSCP 6.1.2 with Windows 11.

Here is error message:

Disconnected from server
Could not retrieve directory listing
Error listing directory '/'.

The log is in attached.

Quite likely the FTP data connection is blocked by a firewall or NAT. See
https://winscp.net/eng/docs/ftp_modes#passive
Can you retrieve the directory listing using any other FTP client running on the same machine as WinSCP? If you can, post its and WinSCP's verbose log files.