Your disk is currently partitioned to boot in bios mode, but you booted
the installer in EFI mode. A warning message prompted you that this
could be a problem and recommended performing a bios mode install
instead, but you chose not to. You either need to perform the bios mode
install, or
When installing the boot loader, grub-install could not find the EFI
partition. WHen setting up the partitioning for your system you will
need to tell the installer to mount (but NOT format) the parition under
/boot/efi/. See
https://help.ubuntu.com/community/UEFI#Creating_an_EFI_System_Partition
Thanks for taking the time to report this bug and helping to make Ubuntu
better. We appreciate the difficulties you are facing, but this appears
to be a "regular" (non-security) bug. I have unmarked it as a security
issue since this bug does not show evidence of allowing attackers to
cross
