install failed crashed with CalledProcessError

likely duplicate of - https://bugs.launchpad.net/subiquity/+bug/1950535

Ubuntu jammy daily (canary) failed install on
- sony vaio svp112a1cw (i5-9400u, 4gb, intel haswell-ULT)

unlike on hp dc7700 earlier today (which closed subiquity window after entry at user/password screen), this got to installing slideshow & showed red-error message on bottom left of window (over purple background so not easy to read)

ProblemType: Bug
DistroRelease: Ubuntu 22.04
Package: subiquity (unknown)
ProcVersionSignature: Ubuntu 5.13.0-19.19-generic 5.13.14
Uname: Linux 5.13.0-19-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.11-0ubuntu73
Architecture: amd64
CasperMD5CheckResult: pass
CasperVersion: 1.465+canary3.3
CrashDB:
 {
        "impl": "launchpad",
        "project": "subiquity",
        "bug_pattern_url": "http://people.canonical.com/~ubuntu-archive/bugpatterns/bugpatterns.xml"
     }
Date: Wed Nov 17 06:03:46 2021
ExecutablePath: /snap/ubuntu-desktop-installer/171/bin/subiquity/subiquity/cmd/server.py
InterpreterPath: /snap/ubuntu-desktop-installer/171/usr/bin/python3.8
LiveMediaBuild: Ubuntu 22.04 LTS "Jammy Jellyfish" - Alpha amd64 (20211116)
MachineType: Sony Corporation SVP11216CGB
ProcAttrCurrent: snap.hostname-desktop-installer.subiquity-server (complain)
ProcCmdline: /snap/hostname-desktop-installer/171/usr/bin/python3.8 -m subiquity.cmd.server --autoinstall=
ProcEnviron:
 LANG=C.UTF-8
 PATH=(custom, no user)
ProcKernelCmdLine: BOOT_IMAGE=/casper/vmlinuz layerfs-path=minimal.standard.live.squashfs maybe-ubiquity --- quiet splash
Python3Details: Error: command ['readlink', '-f', "/usr/bin/which: this version of `which' is deprecated; use `command -v' in scripts instead.\n/usr/bin/python3"] failed with exit code 1: , Error: [Errno 2] No such file or directory: 'Error: command [\'readlink\', \'-f\', "/usr/bin/which: this version of `which\' is deprecated; use `command -v\' in scripts instead.\\n/usr/bin/python3"] failed with exit code 1: ', python3-minimal, 3.9.4-1build1
PythonDetails: N/A
SnapChannel:

SnapRevision: 171
SnapUpdated: False
SnapVersion: 0+git.6179cd7
SourcePackage: subiquity
Title: install failed crashed with CalledProcessError
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 05/17/2013
dmi.bios.release: 2.70
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: R0270V7
dmi.board.asset.tag: N/A
dmi.board.name: VAIO
dmi.board.vendor: Sony Corporation
dmi.board.version: N/A
dmi.chassis.asset.tag: N/A
dmi.chassis.type: 10
dmi.chassis.vendor: Sony Corporation
dmi.chassis.version: N/A
dmi.ec.firmware.release: 2.70
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrR0270V7:bd05/17/2013:br2.70:efr2.70:svnSonyCorporation:pnSVP11216CGB:pvrC60BZAQW:sku54585979:rvnSonyCorporation:rnVAIO:rvrN/A:cvnSonyCorporation:ct10:cvrN/A:
dmi.product.family: VAIO
dmi.product.name: SVP11216CGB
dmi.product.sku: 54585979
dmi.product.version: C60BZAQW
dmi.sys.vendor: Sony Corporation