reinstalation failed

[Rus Vasile Marius]

after i installed new update in 29ian 2019 of lubuntu it could not read the HD -read outside partition...
i boot from my bootable stick the lubuntu 18.4 i verified with geparted the sda partition where was previous intaled- cheked -ok
when i try to boot again from HD the seim happened-read outside partition...
i booted again from stik and i chosse 2.install on hd then -reinstall lubuntu
at the end of instalation-an error occure -send error report....

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: ubiquity 18.04.14
ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17
Uname: Linux 4.15.0-20-generic i686
ApportVersion: 2.20.9-0ubuntu7
Architecture: i386
CasperVersion: 1.394
Date: Tue Jan 29 17:14:01 2019
InstallCmdLine: file=/cdrom/preseed/lubuntu.seed boot=casper only-ubiquity initrd=/casper/initrd.lz quiet splash ---
LiveMediaBuild: Lubuntu 18.04 LTS "Bionic Beaver" - Release i386 (20180426)
ProcEnviron:
 LANGUAGE=en_US.UTF-8
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 LC_NUMERIC=C.UTF-8
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)