Problem with networks after upgrade to 8.1.10

[jabocop]

Yesterday I upgrade from some 8.0 version to 8.1.10. The proxmox server won't get any network connection.
I am a Linux/Proxmox rookie, and I would really appreciate if someone can give me some help.

I try to describe the symptoms
I cannot connect to the proxmox web-client, and it does not reply to ping.
I have connected the server to a monitor, and I can login to the server that way.
I cannot ping the router from the proxmox server (Destination Host Unreachable)
If I run systemctl status networking I got the following:

networking.service - Network initilization
Loaded: loaded(/lib/systemd/networking.service; enabled preset: enabled
Active: active (exited)
Docs: man:interfaces (5)
           man:ifup(8)
           man:ifdown(8)
Process: 504 ExecStart=/usr/share/ifupdown2/sbin/start-networking start (code=exited, status=0/SUCCESS)
Main PID: 504 (code=exited, status=0/SUCCESS)
CPU: 1.190s
proxmox systemd[1]; Starting network service - Network initilization...
proxmox networking[504]: networking: Configuring network interfaces
proxmox networking[603]: error: vmbr0: bridge port enp3s0 does not exist
proxmox /usr/sbin/ifup[603]: warning: vmb0: apply bridge ports settings; bridge configuration failed (missing ports)
proxmox networking[603]: error >>> Full logs available in: /ar/log/ifupdown2/...... <<<

And I cannot find any additional information in the full logs

My interfaces file looks like:

auto lo
iface lo inet loopback

iface enp3s0 inet manual

auto vmbr0
lface vmbr0 inet static
              address 192.168.1.20/24
              gateway 192.168.1.1
              bridge-ports enp3s0
              bridge-stp off
              bridge-fd 0

lface enp2s0 inet manual

lface wlp1s0 inet manual

I tried systemctl restart networking, that does not solve the issue for me.
I also tried to boot into 6.2.16-20 Proxmox VE instead of the new installed 6.5.13-3, and in the old install the network actually works. I also ran brctl show in both versions. In the old version the interfaces enp3s0 and tap100i0 are listed, in the new version only tap100i0.

 

[manutech]

bump, I have the same exact issue, on a Dell R320 Server

 

[manutech]

just did a systemctl restart networking and it started working again