The problem appeared when: 1. I disabled DNS on a domain, that had a lot of changes and I preffered to have the default DNS configuration 2. I try to enable it again. and the message: BIND DNS domain failed! : Can't use string (" here appears the slave DNS server ") as an ARRAY ref while "strict refs" in use at /usr/libexec/webmin/bind8/bind8-lib.pl line 2670. The DNS records were created on the server but: 1. No DNS records were found on the slave 2, DNS looks disabled for the domain.
Problem enabling DNS