Octavia: Virtual network for access to Amphorae is down


I have created an Octavia load balancer. Its Provisioning Status is Active but Operating status is Offline. I tried both the ussuri/stable and yoga/stable versions but am facing the same issue. I need your help to fix this issue.

Octavia status:

root@staging-maas:~/cert# juju status octavia
Model              Controller       Cloud/Region      Version  SLA          Timestamp
openstack-staging  maas-controller  maas-one/default  2.9.49   unsupported  11:30:13+05:30

App                   Version  Status   Scale  Charm         Channel        Rev  Exposed  Message
octavia               10.1.0   blocked      1  octavia       ussuri/stable  282  no       Virtual network for access to Amphorae is down
octavia-mysql-router  8.0.36   active       1  mysql-router  8.0/stable     154  no       Unit is ready
octavia-ovn-chassis   22.03.3  active       1  ovn-chassis   22.03/stable   234  no       Unit is ready

Unit                       Workload  Agent  Machine  Public address  Ports     Message
octavia/0*                 blocked   idle   1/lxd/9      9876/tcp  Virtual network for access to Amphorae is down
  octavia-mysql-router/0*  active    idle                  Unit is ready
  octavia-ovn-chassis/0*   active    idle                  Unit is ready

Machine  State    Address     Inst id               Series  AZ       Message
1        started  staging-controller-1  focal   default  Deployed
1/lxd/9  started  juju-f6bfb5-1-lxd-9   focal   default  Container started

o-hm0 interface status on Octavia/0

root@juju-f6bfb5-1-lxd-9:~# ifconfig o-hm0
o-hm0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet  netmask  broadcast
        inet6 fe80::202b:75ff:fe23:61f9  prefixlen 64  scopeid 0x20<link>
        ether 22:2b:75:23:61:f9  txqueuelen 1000  (Ethernet)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 71  bytes 7997 (7.9 KB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0