@ProfessorFow OK what I want you to do is on the master node, go into the storage group where this remote node is. Look at this remote node. There should be a ftp user ID and password listed there (said from memory). Use those credentials to connect like you did with the ftp CLI from the master node to the remote node. See if you can login using ftp to the remote node. Then issue a ls command, Its not important what the answer is as long as it gives you an answer and not an error.
If you can’t login using those credentials then on the remote storage node look at the /opt/fog directory. There is a hidden file called .fogsettings. issue the command cat /opt/fog/.fogsettings In that file should be the password for the account used when the fog server was installed. Make sure they match what is on the master node.
There is something with ftp that is not working correctly, that is why the replication is not happening.