VLAN dies out of nowhere

Recently one of my friends VLANs has died out of nowhere. It was working fine in the morning and in the afternoon i was being told that it was not working. after looking into it something has died on the routers end and I am unsure as to what has died. I have looked at everything and restarted almost everything that I can think of. I have also restarted the router itself. All other VLANs are working just fine. Where would be the best place to start looking to errors or anything that could be causing this not to work. I am unable to ping the gateway IP of the VLAN from inside a VM and I can't ping any VMs on the VLAN from either the router itself or from different VMs.

Please run the following commands (copy-paste the whole block) and paste the output here, using the "Preformatted text </> " button:
Remember to redact passwords, MAC addresses and any public IP addresses you may have

ubus call system board; \
uci export network; uci export dhcp; uci export firewall; \
head -n -0 /etc/firewall.user; \
ip -4 addr ; ip -4 ro li tab all ; ip -4 ru; \
ip -6 addr ; ip -6 ro li tab all ; ip -6 ru
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