As a first attempt, you could try to restart the box process with systemctl restart box Also maybe look at the system logs, in case there are any hints for errors.

Restic would be really great. For my non-Cloudron services, I use this Docker image: https://github.com/ViViDboarder/docker-restic-cron. It wouldn't make sense to take that as is, but it could be a good example of basic Restic functionality for something like Cloudron.