Normal, pFsense hasn't a FTP server included.
The question has been asked many times, and answered many times because why not.
If you guys do a 1+1 (SSH+FTP) - see the messages above then you have the solution : SFTP !!
Works great with FileZilla or SmartFTP or …! These support de SFTP protocol.
Just remember to use port 22 (SSH) - the user name will be 'root' (not 'admin') ans select the LAN IP of your pfSense box. Use also the SFTP protocol and you'll see !