K3s not starting after upgrade

Hi, after upgrading to Dragonfish-, k3s not longer starts and constantly reports:

Waiting to retrieve agent configuration; server is not ready: invalid node-external-ip: invalid ip format ‘’

I’ve read about clearing network interface descriptions, which might help, but that does nothing, unfortunately. Anyone has an idea what to do?

Found that I had to manually specify ipv4 interface and gateway in app->advanced settings. The question is - why? Why suddenly it stopped autodetecting them?