Secure domain working but anonymous domain guest page retuning 404

I have followed the secured domain guide multiple times and verified that all settings are correct for setting up secure domain and guest page. The secure page is working fine but the guest page keeps on returning DNS_PROBE_FINISHED_NXDOMAIN

there is no such things as secure page and guest page in default secure domain install; you have only one (1) Url to manage. The one and only page becomes a secure page once the user has logged in (an automatic process when creating a room) and stays a guest page when using an existing room (created by a logged-in user).

1 In Prosody:

(If you have installed jitsi-meet from the Debian package, these changes should be made in /etc/prosody/conf.avail/[your-hostname].cfg.lua)

a) Enable authentication on your main domain:

VirtualHost "jitsi-meet.example.com"
    authentication = "internal_plain"

b) Add new virtual host with anonymous login method for guests:

VirtualHost "guest.jitsi-meet.example.com"
    authentication = "anonymous"
    c2s_require_encryption = false

I am talking about the anonymous login method for guests