I've seen the UC Module lose it's route before, couldn't tell you why it does it but it does happen. You can try rebooting it and see if that fixes the issue, or if you want to try and check the routing before you do anything -
SSH into the UC Module (or connect a monitor and keyboard) then run the command
route -n
If the default (0.0.0.0) route is missing, run
sudo su
route add default gw X.X.X.X where X.X.X.X is your default gateway on the LAN 1 network.
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