Clean install with interenet update lasted 30 minutes before I got the error that my install crashed

[MCGO]

Clean install and got the crash report. I did notice it's been repeatedly try to connect to server 268 times for update but server constantly was beeing terminted or connection terminted, the server is US based server but not sure exactly wich one.

ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: ubiquity 2.21.5
ProcVersionSignature: Ubuntu 3.18.0-9.10-generic 3.18.2
Uname: Linux 3.18.0-9-generic x86_64
ApportVersion: 2.15.1-0ubuntu2
Architecture: amd64
CasperVersion: 1.348
Date: Mon May 18 00:49:17 2015
InstallCmdLine: file=/cdrom/preseed/ubuntu-gnome.seed boot=casper initrd=/casper/initrd.lz quiet splash -- maybe-ubiquity
LiveMediaBuild: Ubuntu-GNOME 15.04 "Vivid Vervet" - Alpha amd64 (20150120.1)
ProcEnviron:
 TERM=linux
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)

[Ubuntu Foundations Team Bug Bot (crichton)]

Exception during installation:
May 18 04:48:53 ubuntu-gnome /plugininstall.py: SystemError: E:Sub-process /usr/bin/dpkg returned an error code (1)
May 18 04:48:53 ubuntu-gnome /plugininstall.py:

[Phillip Susi (psusi)]

You are still using the Alpha release. Please update to the final release and try again.