The installation stopped working.

[Kevin]

Before, I stated the installation the GPT table was corrupt . I fixed it, using the comand "sudo gdisk /dev/sda" option "w". Then I started the installation, but it suddenly stopped working.

ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: ubiquity 2.21.25 [modified: lib/partman/automatically_partition/question]
ProcVersionSignature: Ubuntu 3.19.0-15.15-generic 3.19.3
Uname: Linux 3.19.0-15-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.17.2-0ubuntu1
Architecture: amd64
CasperVersion: 1.360
Date: Sun Sep 6 00:17:48 2015
InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz.efi file=/cdrom/preseed/ubuntu.seed cdrom-detect/try-usb=true noprompt floppy.allowed_drive_mask=0 ignore_uuid boot=casper quiet splash ---
LiveMediaBuild: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
ProcEnviron:
 LANGUAGE=es_EC.UTF-8
 PATH=(custom, no user)
 LANG=es_EC.UTF-8
 SHELL=/bin/bash
SourcePackage: grub-installer
UpgradeStatus: No upgrade log present (probably fresh install)