Proxmox web UI does not start

[atsy]

Disclamer: I did read several thread on this subject but it didn't help. I think the problem is something very simple but I cannot get it.

Prehistory: I installed the proxmox ~5-6 month ago (it was working then), then didn't touch it during these months (turned off) and now moved to another network (IP changed) and trying to reanimate. I can access the machine by SSH. But the 4006 port is not open

ss -lnt4
State Recv-Q Send-Q Local AddressPort Peer AddressPort Process
LISTEN 0 128 0.0.0.0:22 0.0.0.0:*
LISTEN 0 4096 0.0.0.0:111 0.0.0.0:*
LISTEN 0 4096 127.0.0.1:85 0.0.0.0:*
LISTEN 0 100 127.0.0.1:25 0.0.0.0:*

What could be the issue ?

1) As I understood the enterprise access has expired since 5 month so I switched to non-subscription repos, following more or less this: https://forum.proxmox.com/threads/proxmox-web-gui-problems.41391/

deb http://download.proxmox.com/debian/ceph-reef bookworm no-subscription
deb http://download.proxmox.com/debian/pve bookworm pve-no-subscription

apt update and upgrade were successful, also `apt install pve-manager`

2) Hosts

cat /etc/hosts
127.0.0.1 localhost.localdomain localhost
192.168.0.121 ha.local ha

3) ip a

2: enp1s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master vmbr0 state UP group default qlen 1000
link/ether 8c:01:60:4c:31:b1 brd ff:ff:ff:ff:ff:ff
3: enp2s0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
link/ether 8c:01:60:4c:31:b2 brd ff:ff:ff:ff:ff:ff
4: wlp3s0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
link/ether c8:21:58:b2:e9:d1 brd ff:ff:ff:ff:ff:ff
5: vmbr0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
link/ether 8c:01:60:4c:31:b1 brd ff:ff:ff:ff:ff:ff
inet 192.168.0.121/24 brd 192.168.0.255 scope global vmbr0
valid_lft forever preferred_lft forever
inet6 fe80::8e01:60ff:fe4c:31b1/64 scope link
valid_lft forever preferred_lft forever

4) interfaces (dhcp address is static for this machine)

cat /etc/network/interfaces
auto lo
iface lo inet loopback
iface enp1s0 inet manual
auto vmbr0
iface vmbr0 inet dhcp
# static
# address 192.168.0.121/24
# gateway 192.168.0.1
bridge-ports enp1s0
bridge-stp off
bridge-fd 0
iface enp2s0 inet manual
iface wlp3s0 inet manual

5) systemctl

systemctl status pvedaemon.service
● pvedaemon.service - PVE API Daemon
Loaded: loaded (/lib/systemd/system/pvedaemon.service; enabled; preset: enabled)
Active: active (running) since Sat 2024-03-30 20:56:22 EET; 14min ago
Process: 838 ExecStart=/usr/bin/pvedaemon start (code=exited, status=0/SUCCESS)
Main PID: 872 (pvedaemon)
Tasks: 4 (limit: 18831)
Memory: 166.3M
CPU: 1.071s
CGroup: /system.slice/pvedaemon.service
├─872 pvedaemon
├─873 "pvedaemon worker"
├─874 "pvedaemon worker"
└─875 "pvedaemon worker"

Mar 30 20:56:21 ha systemd[1]: Starting pvedaemon.service - PVE API Daemon...
Mar 30 20:56:22 ha pvedaemon[872]: starting server
Mar 30 20:56:22 ha pvedaemon[872]: starting 3 worker(s)
Mar 30 20:56:22 ha pvedaemon[872]: worker 873 started
Mar 30 20:56:22 ha pvedaemon[872]: worker 874 started
Mar 30 20:56:22 ha pvedaemon[872]: worker 875 started
Mar 30 20:56:22 ha systemd[1]: Started pvedaemon.service - PVE API Daemon.

systemctl status pveproxy.service
● pveproxy.service - PVE API Proxy Server
Loaded: loaded (/lib/systemd/system/pveproxy.service; enabled; preset: enabled)
Active: active (running) since Sat 2024-03-30 20:56:23 EET; 15min ago
Process: 877 ExecStartPre=/usr/bin/pvecm updatecerts --silent (code=exited, status=0/SUC>
Process: 879 ExecStart=/usr/bin/pveproxy start (code=exited, status=0/SUCCESS)
Main PID: 881 (pveproxy)
Tasks: 4 (limit: 18831)
Memory: 151.4M
CPU: 1.270s
CGroup: /system.slice/pveproxy.service
├─881 pveproxy
├─882 "pveproxy worker"
├─883 "pveproxy worker"
└─884 "pveproxy worker"

Mar 30 20:56:22 ha systemd[1]: Starting pveproxy.service - PVE API Proxy Server...
Mar 30 20:56:23 ha pveproxy[881]: starting server
Mar 30 20:56:23 ha pveproxy[881]: starting 3 worker(s)
Mar 30 20:56:23 ha pveproxy[881]: worker 882 started
Mar 30 20:56:23 ha pveproxy[881]: worker 883 started
Mar 30 20:56:23 ha pveproxy[881]: worker 884 started
Mar 30 20:56:23 ha systemd[1]: Started pveproxy.service - PVE API Proxy Server.

6) journal

journalctl -f
Mar 30 20:57:54 ha systemd[1124]: Reached target basic.target - Basic System.
Mar 30 20:57:54 ha systemd[1124]: Reached target default.target - Main User Target.
Mar 30 20:57:54 ha systemd[1124]: Startup finished in 91ms.
Mar 30 20:57:54 ha systemd[1]: Started user@0.service - User Manager for UID 0.
Mar 30 20:57:54 ha systemd[1]: Started session-1.scope - Session 1 of User root.
Mar 30 20:57:54 ha sshd[1121]: pam_env(sshd:session): deprecated reading of user environment enabled
Mar 30 21:11:10 ha systemd[1]: Starting systemd-tmpfiles-clean.service - Cleanup of Temporary Directories...
Mar 30 21:11:10 ha systemd[1]: systemd-tmpfiles-clean.service: Deactivated successfully.
Mar 30 21:11:10 ha systemd[1]: Finished systemd-tmpfiles-clean.service - Cleanup of Temporary Directories.
Mar 30 21:11:10 ha systemd[1]: run-credentials-systemd\x2dtmpfiles\x2dclean.service.mount: Deactivated successfully.