DHCP issue in Ver 4

When trying to enable DHCP in version 4, I keep getting this error. Anybody seen this before or know how to fix it? I didn’t have any problems in version 3. Also will option 66 work in this version?

apt-get update
apt-get install dnsmasq

Is this a fix for version 4?
Also did you put the provisioning URL in option 66 or just the ip address of the server?

apt is Debian, yum is CentOS. VitalPBX4 is on Debian, VitalPBX3 is on CentOS.

Thank you. I was more curios if dnsmasq was missed in the installation file for version 4 or if this was a fix for version 4.