Daily 6/7/16 Ubuntu Mate Live Install Crash at checking security updates

[noabody]

Daily 6/7/16 Ubuntu Mate Live Install Crash at checking security updates. Selected update while installing.

ProblemType: Bug
DistroRelease: Ubuntu 16.10
Package: ubiquity 16.10.1
ProcVersionSignature: Ubuntu 4.4.0-23.41-generic 4.4.10
Uname: Linux 4.4.0-23-generic x86_64
ApportVersion: 2.20.1-0ubuntu4
Architecture: amd64
CasperVersion: 1.376
Date: Tue Jun 7 19:05:56 2016
InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz.efi bootkbd=us console-setup/layoutcode=en_US console-setup/variantcode=nodeadkeys locale=us_us noprompt cdrom-detect/try-usb=true file=/cdrom/preseed/mint.seed boot=casper initrd=/casper/initrd.lz splash --
LiveMediaBuild: Ubuntu-MATE 16.10 "Yakkety Yak" - Alpha amd64 (20160606)
ProcEnviron:
 LANGUAGE=en_US.UTF-8
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)