proftpd does not ask for passphrase

I configured tls for proftpd I uncomment the line Include /etc/proftpd/tls.conf in the file /etc/proftpd/proftpd.conf I configured `tls.conf However, it seems to not start correctly. I use sudo service proftpd restart. No error message displayed afterwards. I also tried sudo /etc/init.d/proftpd start which returns [ ok ] Starting proftpd (via systemctl): proftpd.service. However, I does…