[Bug 1955701] [NEW] installer crashing wit "Could not restore packages from the previous install"

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installer crashes nearly the end of fresh install of kubuntu 20.04 on lvm with luks.
install kernel 5.11.0-27 on 20.04.3 LTS

in syslog the following error messages appear:
==============================================
in run /usr/share/ubiquity/plugininstall.py: 
#257 in "self.apt_clone_restore()"
#1655 in apt_clone_restore "subprocess.check_call("

in /usr/lib/python3.8/subprocess.py
#364 in check_all raise CalledProcessError(retCode, cmd)

with subprocess.CalledProcessError: Command '[apt-clone', 'restore-new-distro', '/target/ubuquity-apt-clone/apt-clone-state-kubuntu.tar.gz', 'focal', '--destination', '/target'] returned non-zero exit status 1
==============================================

similar error messages are already filed under the below listed bug
reports, the main difference being the line numbers in plugininstall.py

1. https://bugs.launchpad.net/ubuntu/+source/ubiquity/+bug/1881829 
in comment #2

2. https://bugs.launchpad.net/ubuntu/+source/ubiquity/+bug/1928748
in https://launchpadlibrarian.net/539276481/UbiquitySyslog.txt

3. https://bugs.launchpad.net/ubuntu/+source/ubiquity/+bug/1936442
in https://launchpadlibrarian.net/548660333/UbiquitySyslog.txt
and in comment #2

** Affects: ubiquity (Ubuntu)
     Importance: Undecided
         Status: New

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installer crashing wit "Could not restore packages from the previous install"
https://bugs.launchpad.net/bugs/1955701
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