This error has the following cause and solution:
Ftp paths can look like one of the following.
ftp://user:user@www.microsoft.com/ssafe
ftp://user@www.microsoft.com/ssafe
ftp://www.microsoft.com/ssafe
They always start with "ftp://". They always end with the ftp address (server name and, optionally, directory path). In between, you may have nothing (as in the bottom example above). Or, you may have a username (as in the middle), or a username and password (as on the top).