You try to install Ubuntu in UEFI mode, but you do not have an EFI- System-Partition. Your Windows seems to be installed in BIOS mode on your first disk. To get a working dual boot, you have to start the installer in BIOS mode and create an bios_grub partition on your GPT disk for Grub or install Grub on your first disk.
** Changed in: grub-installer (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1715675 Title: Grub installation on new computer crashed To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/grub-installer/+bug/1715675/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs