SFTP Failed to get address info

I'm able to connect to this SFTP site on the same PC I'm writing this code on using FileZilla using all default settings

Using the host name, I get the below error

ChilkatLog:
  Connect_SFtp(31ms):
    DllDate: Nov 12 2016
    ChilkatVersion: 9.5.0.64
    UnlockPrefix: *********
    Architecture: Little Endian; 64-bit
    Language: .NET 4.6 / x64
    VerboseLogging: 1
    SftpVersion: 0
    Component successfully unlocked using purchased unlock code.
    connectInner(31ms):
      hostname: *****.***.***
      port: 22
      sshConnect(16ms):
        connectSocket(16ms):
          domainOrIpAddress: *****.***.***
          port: 22
          connectTimeoutMs: 5000
          connect_ipv6_or_ipv4(16ms):
            Multi-threaded domain to IP address resolution
            resolveHostname6(16ms):
              getAddressInfo(16ms):
                Failed to get host address info. (3)
                SocketError: Error 0x2afb
                Check to make sure the connection is not blocked by a firewall or anti-virus port filtering.
                hostOrIpAddr: *****.***.***
                port: 22
                Versions of Windows earlier than Windows XP are limited to handling IPv4 only
                On Windows Server 2003 and Windows XP, IPv6 addresses are returned only if IPv6 is installed on the local computer.
              --getAddressInfo
            --resolveHostname6
            Domain to IP address resolution failed.
          --connect_ipv6_or_ipv4
        --connectSocket
        Failed to establish initial TCP/IP connection
      --sshConnect
    --connectInner
    Failed.
  --Connect_SFtp
--ChilkatLog

If I use the IP address, I get a different error

ChilkatLog:
  Connect_SFtp(31ms):
    DllDate: Nov 12 2016
    ChilkatVersion: 9.5.0.64
    UnlockPrefix: 
    Architecture: Little Endian; 64-bit
    Language: .NET 4.6 / x64
    VerboseLogging: 1
    SftpVersion: 0
    Component successfully unlocked using purchased unlock code.
    connectInner(16ms):
      hostname: ***.***.***.***
      port: 22
      sshConnect(16ms):
        connectSocket(16ms):
          domainOrIpAddress: ***.***.***.***
          port: 22
          connectTimeoutMs: 5000
          connect_ipv6_or_ipv4:
            This is an IPV4 numeric address.
            Domain to IP address resolution not needed.
            connecting to IPV4 address...
            ipAddress: ***.***.***.***
            createSocket:
              ai_family: 2
              ai_socktype: 1
              ai_protocol: 0
              SocketError: WSAEINVAL An invalid argument was supplied.
            --createSocket
            Failed to create socket for connecting.
          --connect_ipv6_or_ipv4
        --connectSocket
        Failed to establish initial TCP/IP connection
      --sshConnect
    --connectInner
    Failed.
  --Connect_SFtp
--ChilkatLog

Using FileZilla, I do have to click through a warning box stating that the server's host key is unknown - Is that the error SFTP is running into? If so I need to bypass it - I trust the site

Thoughts?