Kubuntu - Installation - Disk Setup - Configuration of encrypted volumes failed

[Do Re]

Kubuntu 18.04 daily 2018-04-04. [systemcrashing]
reproduceable on AMD64 and i386 (downloads SAH256 checked)
i hit this also on a previous daily-build some days before

steps to reproduce:

While booting Live-USB and install Kubuntu via UI
at the point
- Disk Setup
with the option
- Guided - use entire disk and set up encrypted LVM

a message appears:

"Configuration of encrypted volumes failed
An error occurred while configuring encrypted volumes.
The configuration have been aborted."

After trying multiple times to install with encrypted LVM with the error message coming again and again i startet without encryption. than there have been the errormessage written above that stopped the installation. fter klicking back a partition was created with about half of my disksize without advising to do so. Crash with message like "volume has not enough space" resulting in black screen and reboot. And Error informing kernal ... (please see the pictures i made)

now the USB-Stick is not anymore in the bootable devices and booting my harddrive let me see a blinking _ underline on a black screen

Not sure if i am right place here; It was not possible for me to create a new empty bugreport. Failed installtaion made my system unbootable so i can not report out of the damaged system. Please be so kind to put this in the right place if necessary. Sorry im not at all expirienced with debugging or such. It is a new Laptop with PCI-Express SSD and Intel Core i3-7100U. "Acer Swift 3 SF314-52-385X"

three pictures hitting the bug (screen-photos)
- http://fs1.directupload.net/images/180405/qqsncezm.jpg
- http://fs1.directupload.net/images/180405/dsl9i7n8.jpg
- http://fs1.directupload.net/images/180405/vfdxrri6.jpg
thanky

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.