This article covers fixes to '500 oops vsftpd refusing to run with writable root inside chroot()' error which occurs while connecting to vsftpd if it is a newly installed vsftpd or if it is upgraded.
To fix this error, you need to upgrade your Server by adding the jessie repository to my Debian installation and upgrade it so:
echo "deb http://ftp.us.debian.org/debian jessie main contrib non-free" >> /etc/apt/sources.list
aptitude upgrade vsftpd
echo "allow_writeable_chroot=YES" >> /etc/vsftpd.conf
service vsftpd restart
Also, add the value:
to the configuration and restart the service with service vsftpd restart: