Unbound fails on startup, attempt to install with pihole on Centos7

[brianread108]

Feb 02 18:19:17 pihole systemd[1]: Starting Unbound recursive Domain Name Server... Feb 02 18:19:17 pihole unbound-checkconf[377]: unbound-checkconf: no errors in /etc/unbound/unbound.conf Feb 02 18:19:17 pihole systemd[1]: Started Unbound recursive Domain Name Server. Feb 02 18:19:17 pihole unbound[379]: Feb 02 18:19:17 unbound[379:0] error: can't bind socket: Address already in use for ::1 Feb 02 18:19:17 pihole unbound[379]: Feb 02 18:19:17 unbound[379:0] fatal error: could not open ports Feb 02 18:19:17 pihole systemd[1]: unbound.service: main process exited, code=exited, status=1/FAILURE Feb 02 18:19:17 pihole systemd[1]: Unit unbound.service entered failed state. Feb 02 18:19:17 pihole systemd[1]: unbound.service failed.

Using this link

https://docs.pi-hole.net/guides/dns/unbound/