Kubuntu 16.04 installer crashes

[Pacific Seascape]

The Kubuntu 16.04 installer is currently not working. It's utterly useless. Cannot get past the "Prepare" step.

Error:

Traceback (most recent call last):
  File "/usr/lib/ubiquity/ubiquity/frontend/kde_ui.py", line 1068, in on_next_clicked
    self.dbfilter.ok_handler()
  File "/usr/lib/ubiquity/plugins/ubi-prepare.py", line 344, in ok_handler
    secureboot_key = self.ui.get_secureboot_key()
AttributeError: 'PageKde' object has no attribute 'get_secureboot_key'

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: ubiquity 2.21.43
ProcVersionSignature: Ubuntu 4.3.0-7.18-generic 4.3.3
Uname: Linux 4.3.0-7-generic x86_64
ApportVersion: 2.19.4-0ubuntu1
Architecture: amd64
CasperVersion: 1.366
CurrentDesktop: KDE
Date: Thu Jan 28 04:09:27 2016
InstallCmdLine: file=/cdrom/preseed/kubuntu.seed boot=casper maybe-ubiquity initrd=/casper/initrd.lz quiet splash --- maybe-ubiquity
LiveMediaBuild: Kubuntu 16.04 LTS "Xenial Xerus" - Alpha amd64 (20160127)
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)

[Flames_in_Paradise (ellisistfroh-deactivatedaccount)]

Thank you for taking the time to report this bug and helping to make Ubuntu better.

This particular bug has already been reported and is a duplicate of bug #1529450, so it is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report.

Feel free to continue to report any other bugs you may find.

[Launchpad Janitor (janitor)]

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

[somekool (somekool)]

how can this have been reported in January and not fix by release of LTS ?

I am trying to get you a new user and now she looks at this puzzled.

very bad