I’ve installed dietpi on a 16GB sd for raspberrypi 3B. Install went ok with no issues that I could see. When running dietpi-software and installing plex from list it shows install completed at the end and a command appears indicating the applications are restarting, but it never reboots. I have now plex installed but I should have (after the reboot I guess) an automatic configuration screen that never appears. I tried different softwares in the meantime but never got a reboot or configuration screen for any.
probably some very old guides you are looking to. Next, this is not a configuration screen. It seems an information that appears during installation. Not after. Just follow our online docs to connect.