A comment by Siege
I recently stumbled on to this same issue because I ran the Ubunutu update. This page helped me: https://gitmemory.cn/index.php/repo/deconz-community/deconz-docker/issues/45. The short story is that you need to reinstall the linux-modules-extra-raspi package, then reboot. That package gets removed in the Ubuntu upgrade, and that's the problem.