Unable to connect to server after updating FileZilla

[Frank]

I've looked through the tickets on here however I haven't yet found a solution that fits my situtaion. I receive the following dialogue now when trying to connect to my server.

Status: Resolving address of ftp.atlanticpacificpro.com
Status: Connecting to 142.4.31.20:21...
Status: Connection established, waiting for welcome message...
Status: Initializing TLS...
Status: Verifying certificate...
Status: TLS connection established.
Status: Connected
Status: Retrieving directory listing...
Command: PWD
Response: 257 "/" is your current location
Command: TYPE I
Response: 200 TYPE is now 8-bit binary
Command: PASV
Response: 227 Entering Passive Mode (142,4,31,20,237,168)
Command: MLSD
Error: The data connection could not be established: ECONNREFUSED - Connection refused by server

I've gone through the Network Config Wizard (Passive Mode, Local Firewall grants access, getting external IP via ​http://ip.filezilla-project.org/ip.php) and receive the following dialogue.

Connecting to probe.filezilla-project.org
Response: 220 FZ router and firewall tester ready
USER FileZilla
Response: 331 Give any password.
PASS 3.13.1
Response: 230 logged on.
Checking for correct external IP address
Retrieving external IP address from ​http://ip.filezilla-project.org/ip.php
Checking for correct external IP address
IP 75.76.211.250 hf-hg-cbb-cfa
Response: 200 OK
PREP 51259
Response: 200 Using port 51259, data token 1665000830
PORT 75,76,211,250,200,59
Connection closed

I'm not sure what to do next. Any help or input would be greatly appreciated. Thank you.

[Tim Kosse]

Most likely your server is behind a firewall or NAT router that isn't configured correctly for FTP over TLS. In that case, contact your server administrator or server hosting provider for assistance so that the server can be fixed.

As for the network configuration wizard test, have a look at ​https://wiki.filezilla-project.org/Network_Configuration