Ftp connection closed by remote host localhost

By Gerardo 30.06.2018
To our knowledge, nothing has changed on the firewall, LAN, etc. Is that the firewall that's causing this. When I use the command line I get the Connection closed by remote host error.
Ftp connection closed by remote host localhost
Basic and anonymous is enabled. We have no problem connecting to the host. Thanks to Brent Catlett, this afternoon I learned that you can now insert images into your Google Forms.
Ftp connection closed by remote host localhost
Get someone on the internet to try it out for you. While logging in via ftp localhost, it prompts for credentials and I get in just fine. I am also able to connect to ftp via localhost from the command line. I am then able to use other commands dir. I get ftp connection closed by remote host.