installation crashed installing Mate 22.04 aside Ubuntu 22.04 on one disk

[VAN LAETHEM]

I'm trying to install Mate 22.04 on a disk where Ubuntu 22.04 is already present en functioning correctly.

I tried it several ways:
-opting for the choice 'other' an choosing the partition by my self
-simply asking the installer to install Mate aside Ubuntu

Both solutions crash.

ProblemType: Bug
DistroRelease: Ubuntu 22.04
Package: ubiquity 21.10.10
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
Date: Tue Dec 7 17:47:16 2021
InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/ubuntu-mate.seed maybe-ubiquity quiet splash ---
LiveMediaBuild: Ubuntu-MATE 22.04 LTS "Jammy Jellyfish" - Alpha amd64 (20211120)
ProcEnviron:
 LANGUAGE=fr_BE.UTF-8
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=fr_BE.UTF-8
 LC_NUMERIC=C.UTF-8
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)