Automated install never makes HTTP request for answer file

[champskarl]

Hello!
I am attempting to automate the install of Proxmox VE following the instructions at https://pve.proxmox.com/wiki/Automated_Installation .
I have run into a bit of a problem where the PVE installer does not make the HTTP POST request to get the answerfile.

PVE Version: 8.3

Install Logs

Welcome to the Proxmox VE 8.3 installer   [ initrd  1.54GiB  100%  22.48MiB/s ]                                   |
initial setup startup                                                                                             |
mounting proc filesystem                                                                                          |
mounting sys filesystem                                                                                           |
EFI boot mode detected, mounting efivars filesystem                                                               |
boot comandline: BOOT_IMAGE=(tftp)os/proxmox/linux26 ramdisk_size=16777216 rw quiet splash=silent console=ttyS1,57|
600n8 proxmox-start-auto-installer                                                             |
console is ttyS1                                                                                                  |
loading drivers:  nvidiafb ahci mac_hid acpi_pad wmi ipmi_si ipmi_ssif i2c_i801 ehci_pci intel_pch_thermal acpi_cp|
ufreq efi_pstore pcspkr intel_cstate rapl aesni_intel sha1_ssse3 sha256_ssse3 ghash_clmulni_intel polyval_clmulni |
crc32_pclmul crct10dif_pclmul kvm_intel intel_powerclamp x86_pkg_temp_thermal intel_rapl_common                   |
found proxmox ISO image inside initrd image                                                                       |
preparing installer mount points and working environment                                                          |
switching root from initrd to actual installation system                                                          |
Starting Proxmox installation                                                                                     |
EFI boot mode detected, mounting efivars filesystem                                                               |
Installing additional hardware drivers                                                                            |
Starting hotplug events dispatcher: systemd-udevd.                                                                |
Synthesizing the initial hotplug events (subsystems)...done.                                                      |
Synthesizing the initial hotplug events (devices)...done.                                                         |
Waiting for /dev to be fully populated...done.                                                                    |
mount: devpts mounted on /dev/pts.                                                                                |
/bin/dbus-daemon                                                                                                  |
starting D-Bus daemon                                                                                             |
Setting terminal size to 80x24 for serial install
Preparing DHCP as potential source to get location of automatic-installation answer file
Attempting to get DHCP leases... Internet Systems Consortium DHCP Client 4.4.3-P1
Copyright 2004-2022 Internet Systems Consortium.
All rights reserved.
For info, please visit https://www.isc.org/software/dhcp/

Listening on LPF/ens1f1np1/0c:42:a1:19:a3:83
Sending on   LPF/ens1f1np1/0c:42:a1:19:a3:83
Listening on LPF/ens1f0np0/0c:42:a1:19:a3:82
Sending on   LPF/ens1f0np0/0c:42:a1:19:a3:82
Sending on   Socket/fallback
DHCPDISCOVER on ens1f1np1 to 255.255.255.255 port 67 interval 3
DHCPDISCOVER on ens1f0np0 to 255.255.255.255 port 67 interval 6
DHCPOFFER of 192.168.48.13 from 192.168.48.1
DHCPREQUEST for 192.168.48.13 on ens1f0np0 to 255.255.255.255 port 67
DHCPACK of 192.168.48.13 from 192.168.48.1
bound to 192.168.48.13 -- renewal in 129 seconds.
done
Starting chrony for opportunistic time-sync...
Starting a root shell on tty3.
trying to detect country...
detected country: US
Caching device info from udev

Automatic installation selected but no config for fetching the answer file found!
Starting debug shell, to fetch the answer file manually use:
  proxmox-fetch-answer MODE >/run/automatic-installer-answers
and enter 'exit' or press 'CTRL' + 'D' when finished.
root@proxmox:/#

Per the guide above (Under the headers "Prepare an Installation ISO" > "Answer Fetched via HTTP" ) I have configured the URL to be provided via DHCP options.
I have verified the PVE installer gets the options based on the contents of /var/lib/dhcp/dhclient.leases

lease {
  interface "ens1f0np0";
  fixed-address 192.168.48.13;
  option subnet-mask 255.255.252.0;
  option routers 192.168.48.1;
  option dhcp-lease-time 300;
  option dhcp-message-type 5;
  option domain-name-servers 8.8.8.8;
  option dhcp-server-identifier 192.168.48.1;
  option broadcast-address 192.168.51.255;
  option proxmox-auto-installer-manifest-url "http://192.168.48.1:4080/v1/api/proxmox";
  renew 3 2025/01/22 15:53:07;
  rebind 3 2025/01/22 15:55:12;
  expire 3 2025/01/22 15:55:50;
}

However it never reaches out to the url http://192.168.48.1:4080/v1/api/proxmox.
I have verified this by running tcpdump on the webserver, there is no traffic coming from the system running the PVE install.

At the end of the install logs it indicates I can continue the install by running the following:

proxmox-fetch-answer http http://192.168.48.1:4080/v1/api/proxmox >/run/automatic-installer-answers

This executes just fine, http request gets made and the answerfile is returned with no problems, I can then continue the install.

Question based on the error phrasing:
Do I still need to run the ISO through proxmox-auto-install-assistant when providing the answerfile via DHCP?
The guide makes it seem like its either/or, not a requirement when using HTTP + DHCP options.

Would anyone be able to help me figure this out?
Thanks in advance!