[Leapp][IPU7>8] zipl-switch-to-blscfg execution failed with non zero exit code

Issue

During the leapp upgrade, it fails with the below error:

Jan 26 14:32:34 localhost upgrade[647]: Message: zipl-switch-to-blscfg execution failed with non zero exit code.
Jan 26 14:32:34 localhost upgrade[647]: Summary:
Jan 26 14:32:34 localhost upgrade[647]:     Details: Command ['systemd-nspawn', '--register=no', '--quiet', '-D', u'/var/lib/leapp/el8userspace', '--bind=/boot', '--bind=/dev', '--setenv=LEAPP_UPGRADE_PATH_TARGET_RELEASE=8.9', '--setenv=LEAPP_NO_RHSM=1', '--setenv=LEAPP_EXPERIMENTAL=0', '--setenv=LEAPP_UPGRADE_PATH_FLAVOUR=default', '--setenv=LEAPP_COMMON_TOOLS=:/etc/leapp/repos.d/system_upgrade/common/tools:/etc/leapp/repos.d/system_upgrade/el7toel8/tools', '--setenv=LEAPP_NO_RHSM_FACTS=1', '--setenv=LEAPP_COMMON_FILES=:/etc/leapp/repos.d/system_upgrade/common/files:/etc/leapp/repos.d/system_upgrade/el7toel8/files', '--setenv=LEAPP_ENABLE_REPOS=rhel-8.8-baseos-eus-s390x,rhel-8.8-appstream-eus-s390x', '--setenv=LEAPP_IPU_IN_PROGRESS=7to8', '--setenv=LEAPP_UNSUPPORTED=0', '--setenv=LEAPP_EXECUTION_ID=52af55bc-cf06-4741-b4b0-1ef7884d2d3d', '--setenv=LEAPP_HOSTNAME=XXX', '/usr/sbin/zipl-switch-to-blscfg'] failed with exit code 1.
Jan 26 14:32:34 localhost upgrade[647]:     Stderr: Directory /var/lib/leapp/el8userspace lacks the binary to execute or doesn't look like a binary tree. Refusing.