The server fedia.io had been running on started developing stability problems overnight from Thursday April 4 to Friday April 5. By Saturday (today), the system was completely unbootable. After attempting to resolve the hardware issue with Hetzner (the ISP) for about 6 hours, I gave up and moved the site to a new server. All that took quite a lot of time, during which fedia.io was not available. My apologies for this.