Hello, based on the following it looks a little like you've selected an EFI install but don't have the correct EFI partitioning. I hope this helps:
Oct 3 13:09:25 ubuntu ubiquity: Setting up grub-efi-amd64-signed (1.93.5+2.02-2ubuntu8.4) ... Oct 3 13:09:25 ubuntu ubiquity: Instalando para plataforma x86_64-efi. Oct 3 13:09:25 ubuntu ubiquity: grub-install: error: no se puede encontrar el directorio EFI. Oct 3 13:09:25 ubuntu ubiquity: dpkg: error processing package grub-efi-amd64-signed (--configure): -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1796035 Title: problem installing ubuntu 18.04 for several times (I've formatted the hard disk and even change for another one but still the error To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/grub-installer/+bug/1796035/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
