It looks like this was an upgrade of a previous install and there were some issue with some packages on the originally installed system.
Apr 18 04:16:51 lubuntu ubiquity: dpkg-deb: warning: './dpkg-repack-6655/DEBIAN/control' contains user-defined field 'Original-Maintainer'
Apr 18 04:16:51 lubuntu ubiquity: dpkg-deb: warning: ignoring 1 warning about the control file(s)
Apr 18 04:16:51 lubuntu ubiquity:
Apr 18 04:16:51 lubuntu ubiquity: dpkg-deb: building package `libva1' in `./libva1_1.3.0-2_i386.deb'.
Apr 18 04:16:51 lubuntu ubiquity: dpkg-query: package 'libva-intel-vaapi-driver' is not installed and no information is available
Apr 18 04:16:51 lubuntu ubiquity: Use dpkg --info (= dpkg-deb --info) to examine archive files,
Apr 18 04:16:51 lubuntu ubiquity: and dpkg --contents (= dpkg-deb --contents) to list their contents.
Apr 18 04:16:51 lubuntu ubiquity: dpkg-repack: Fatal Error: Package libva-intel-vaapi-driver not fully installed
Apr 18 04:16:52 lubuntu ubiquity: dpkg-query: package 'libva-x11-1' is not installed and no information is available
It looks like this was an upgrade of a previous install and there were some issue with some packages on the originally installed system.
Apr 18 04:16:51 lubuntu ubiquity: dpkg-deb: warning: './dpkg- repack- 6655/DEBIAN/ control' contains user-defined field 'Original- Maintainer' 1.3.0-2_ i386.deb' . intel-vaapi- driver' is not installed and no information is available vaapi-driver not fully installed
Apr 18 04:16:51 lubuntu ubiquity: dpkg-deb: warning: ignoring 1 warning about the control file(s)
Apr 18 04:16:51 lubuntu ubiquity:
Apr 18 04:16:51 lubuntu ubiquity: dpkg-deb: building package `libva1' in `./libva1_
Apr 18 04:16:51 lubuntu ubiquity: dpkg-query: package 'libva-
Apr 18 04:16:51 lubuntu ubiquity: Use dpkg --info (= dpkg-deb --info) to examine archive files,
Apr 18 04:16:51 lubuntu ubiquity: and dpkg --contents (= dpkg-deb --contents) to list their contents.
Apr 18 04:16:51 lubuntu ubiquity: dpkg-repack: Fatal Error: Package libva-intel-
Apr 18 04:16:52 lubuntu ubiquity: dpkg-query: package 'libva-x11-1' is not installed and no information is available