Cannot connect to FTP server, the following error is shown:
Command: LIST Response: 534-Protection level negotiation failed. Response: Win32 error: Access is denied. Response: Error details: Protection negotiation failed. PROT command with recognized parameter must precede this command. Response: 534 End Error: Failed to retrieve directory listing
FTP client expects the certificate or secure connection.
Enable "Allow both secure FTPS and non-secure FTP connections" option for the IP address under Plesk -> Tools & Settings -> IP Addresses -> 188.8.131.52.