NIC Going Offline After Some Time

I recently installed another 32 GB of RAM into my system, and now my NIC is going offline? It's strange because my Proxmox host still shows the device listed when I run ip a and such. My Modem doesn't show my host NIC being connected at all though... Reviewing the system logs shows this below before I can no longer access the internet. I am not sure if it's my NIC or what, but any help would be greatly appreciated.

Please note that everything was working fine for the last 3 months until I...

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