/var/www/new/ehcp/net2ftp/includes/filesystem.inc.php on line 64.
function ftp_openconnection (/var/www/new/ehcp/net2ftp/modules/browse/browse.inc.php on line 223)
function net2ftp_module_printBody (/var/www/new/ehcp/net2ftp/main.inc.php on line 313)
function net2ftp (/var/www/new/ehcp/net2ftp/index.php on line 59)

Solved:(edit vsftpd.conf file)
seccomp_sandbox=NO
allow_writeable_chroot=YES

and restart the vsftpd server

sudo service vsftpd restart