Hey Denn, I managed to figure it out. If you have the same problem as me, do the following:
ssh into your node:
ssh umbrel@umbrel.local
then remove these two files (likely corrupted by bad shutdown), one command at a time:
sudo rm ./umbrel/app-data/bitcoin/data/bitcoin/settings.json
sudo rm ./umbrel/app-data/bitcoin/data/bitcoin/peers.dat
then reboot:
sudo reboot
Should be syncing again. 