SNMP not working

hello everyone, good day to you all. I’m trying to add my DNS server (ubuntu 22.04Lts) on LibreNMS as a host for monitoring. But i’m getting the error with SNMP not responding on device and Check on SNMP Service and Device marked down.
And also storage graph, Processor graph and Memory graph are not appears.

When i examine the snmp with snmpwalk command, it’s working and got reply.
Appreciates for you help.

A couple of things:

  1. which version of SNMP are you using? v1 v2 v3? Hopefully v3.
  2. What logs have you looked at - on your LNMS host - On your DNS server

Could you copy here the snmpwalk query that you made in the LibreNMS host console?