Fixing the “Unable to connect” issue
1) Error “Server sent passive reply with unroutable address. Using server address instead.”

Filezilla-connecting-error

This issue persists because the server is unable to connect in passive mode

2) Switch to Active mode in File Zilla and you are in.
Goto File Zilla >> Edit >> Settings >> Connection >> FTP >> Passive mode >> “Fall back to active”
aws_ftp_active_mode


3) As a alternate, you can do this also
FileZilla => Edit => Settings => FTP=> Transfer Mode (Click on "Active" and then Tick "Allow fall back to ......"
Filezilla-connection
4) Re-connect your FTP user !!!