Network Interface Not Connecting

[SpaceFlier]

I've got 2 servers in a Proxmox cluster and each of them has a nic which has 4 10g sfp+ ports. I've taken a transceiver and connected it to a fibre cable to a USW Enterprise 48 PoE switch. This was working fine until a while back were both servers lost connection over fibre. I ran an ethernet cable as a temp measure and it's finally time for me to troubleshoot the problem. Looking in ethtool I get the details for the connection with link speed and duplex however I get link detected: no

root@prox1:~# ethtool enp10s0f1np1
Settings for enp10s0f1np1:
        Supported ports: [ FIBRE ]
        Supported link modes:   10000baseT/Full
                                1000baseX/Full
                                10000baseSR/Full
                                10000baseLR/Full
        Supported pause frame use: Symmetric Receive-only
        Supports auto-negotiation: Yes
        Supported FEC modes: Not reported
        Advertised link modes:  10000baseT/Full
                                1000baseX/Full
                                10000baseSR/Full
                                10000baseLR/Full
        Advertised pause frame use: No
        Advertised auto-negotiation: Yes
        Advertised FEC modes: Not reported
        Speed: 10000Mb/s
        Duplex: Full
        Auto-negotiation: off
        Port: FIBRE
        PHYAD: 0
        Transceiver: internal
        Supports Wake-on: d
        Wake-on: d
        Current message level: 0x00000007 (7)
                               drv probe link
        Link detected: no

If i unplug the cable it falls back not knowing any details with duplex and speed unknown. My /etc/network/interfaces file looks like this:

auto lo
iface lo inet loopback

iface eno1 inet manual

iface enp6s0 inet manual

iface enp7s0 inet manual

iface eno2 inet manual

iface enp10s0f0np0 inet manual

iface enp10s0f1np1 inet manual

iface enp10s0f2np2 inet manual

iface enp10s0f3np3 inet manual

auto vmbr0
iface vmbr0 inet static
        address 192.168.2.2/24
        gateway 192.168.2.1
        bridge-ports eno1
        bridge-stp off
        bridge-fd 0
        bridge-vlan-aware yes
        bridge-vids 2-4094

source /etc/network/interfaces.d/*

I have tried changing bridge-ports to enp10s0f1np1 however, that does not affect the ports. in the Unifi dashboard, I can ping that interface but I get no return. Dmesg has no errors and it recognises everything fine plugging in and out the cable.
What are my next steps for figuring out what's wrong and what can I do to solve it?