Lubuntu 23.04 is End of Life thus has no community support.
Refer
- https://lubuntu.me/lubuntu-23-04-end-of-life/
- Lubuntu 23.04 (Lunar Lobster) reached End of Life on January 25, 2024
Lubuntu 23.04 has reached end-of-life as of today, January 25, 2024. It will no longer receive software updates (including security fixes) or technical support.
which applies to all Ubuntu 23.04 systems (and other flavors too)
This is a follow-up to the End of Life warning sent earlier to confirm that as of January 25, 2024, Ubuntu 23.04 is no longer supported.
Why are you trying to install a release that reached EOL some time ago? Why not install a supported system?