It looks like grub was unable to find a suitable EFI partition to install into (from Ubi:
Aug 21 00:58:46 ubuntu ubiquity: Installing for x86_64-efi platform. Aug 21 00:58:46 ubuntu ubiquity: grub-install: error: cannot find EFI directory. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1711975 Title: aaa To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/grub-installer/+bug/1711975/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
