VSFTPD Exploit failed, unreachable

Working on a school project and I’m encountering an issue when trying to run the exploit in Metasploit. I’m using the vsftp exploit and when I run the exploit an error pops up:

"Exploit failed [unreachable]: Rex::ConnectionRefused The connectionw as refused by the remote host ( Exploit Completed, but no session was created."

Running all this in a VM of Kali Linux.

Any help would be appreciated.