RCLee wrote: ↑Fri Dec 29, 2017 1:24 am
What does it mean, how can I fix it? Please, someone, help me.
It almost certainly means there's an error in the dhcp server configuration files.
Read the logs and that will probably tell you what's wrong - the logging from the isc dhcpd server is usually very good (I've been using it for 15+ years)