Secondary DNS is not working

I use both ips on my router.

 

% dig @45.90.28.80        

 

; <<>> DiG 9.10.6 <<>> @45.90.28.80

; (1 server found)

;; global options: +cmd

;; Got answer:

;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 7025

;; flags: qr rd ra ad; QUERY: 1, ANSWER: 13, AUTHORITY: 0, ADDITIONAL: 1

 

;; OPT PSEUDOSECTION:

; EDNS: version: 0, flags:; udp: 1232

;; QUESTION SECTION:

;. IN NS

 

;; ANSWER SECTION:

. 36565 IN NS b.root-servers.net.

. 36565 IN NS i.root-servers.net.

. 36565 IN NS d.root-servers.net.

. 36565 IN NS k.root-servers.net.

. 36565 IN NS l.root-servers.net.

. 36565 IN NS g.root-servers.net.

. 36565 IN NS j.root-servers.net.

. 36565 IN NS h.root-servers.net.

. 36565 IN NS c.root-servers.net.

. 36565 IN NS m.root-servers.net.

. 36565 IN NS a.root-servers.net.

. 36565 IN NS f.root-servers.net.

. 36565 IN NS e.root-servers.net.

 

;; Query time: 53 msec

;; SERVER: 45.90.28.80#53(45.90.28.80)

;; WHEN: Sun Jun 01 05:17:40 -03 2025

;; MSG SIZE  rcvd: 239

 

hugodanieloliveraferreira@iMac ~ % dig @45.90.30.80

 

; <<>> DiG 9.10.6 <<>> @45.90.30.80

; (1 server found)

;; global options: +cmd

;; connection timed out; no servers could be reached

 

Is possible fix this.

 

Best!