The .sb zone doesn’t have any nameservers for your domain (WHOIS doesn’t seem to work). Contact your registrar.
dig +trace +nodnssec te.sb
; <<>> DiG 9.10.6 <<>> +trace +nodnssec te.sb
;; global options: +cmd
. 513960 IN NS a.root-servers.net.
...
. 513960 IN NS m.root-servers.net.
;; Received 239 bytes from 127.0.2.2#53(127.0.2.2) in 24 ms
sb. 172800 IN NS ns1.anycastdns.cz.
sb. 172800 IN NS ns2.anycastdns.cz.
sb. 172800 IN NS pch.nic.sb.
;; Received 209 bytes from 192.5.5.241#53(f.root-servers.net) in 66 ms
sb. 86400 IN SOA dns1.telekom.net.sb. dns.telekom.net.sb. 2025062005 480 300 259200 86400
;; Received 91 bytes from 2a00:fea0:dead::beef#53(ns1.anycastdns.cz) in 105 mstype or paste code here