Can't access TrueNas webui locally or ping system - but can connect over Tailscale?

Strange problem occurred overnight. Beszel reported TrueNas was down.

Couldn’t log into web interface, or ping the system. It’s on it’s own VLAN.

I can access it via Tailscale luckily and from a pc in the same VLAN.

Nothing has changed (voluntarily) with my Unifi network or TrueNas - although there are some notes in 25.10.2.1 about network card binding.

I can still quite happily access SAMBA shares.

VLAN is not isolated in Unifi and it’s in the INTERNAL zone, the same as my main pc which is on an ADMIN vlan.

I am at a loss as to what to do next…

Everything seems fine - apart from my inability to login on the local ip address.

Any suggestions as to what to try?

Perhaps the network card is failing… but it seems quite happy to work in other ways.

Many thanks!

M