Configuring bootloader error

I'm trying to install eOS 6 build on separate drive (500Gb). Right now I'm running eOS 5 in dualboot with Windows 10:

I tried to install eOS 6 on `sdd`, but got this error:
```
INFO: configuring bootloader
INFO: running "chroot" "/tmp/distinst.NJBJEwtbXwRd" "kernelstub" "--esp-path" "/boot/efi" "--add-options" "quiet loglevel=0 systemd.show_status=false splash" "--loader" "--manage-only" "--force-update" "--verbose"
INFO: running "chroot" "/tmp/distinst.NJBJEwtbXwRd" "update-grub"
WARN: Sourcing file `/etc/default/grub'
WARN: Sourcing file `/etc/default/grub.d/init-select.cfg'
WARN: Generating grub configuration file ...
WARN: Found linux image: /boot/vmlinuz-5.4.0-62-generic
WARN: Found initrd image: /boot/initrd.img-5.4.0-62-generic
WARN: /dev/sdf: open failed: No medium found
WARN: /dev/sdg: open failed: No medium found
WARN: /dev/sdf: open failed: No medium found
WARN: /dev/sdg: open failed: No medium found
WARN: Found elementary OS 5.1.7 Hera (5.1.7) on /dev/sdc1
INFO: configuring keyboard layout
INFO: running "chroot" "/tmp/distinst.NJBJEwtbXwRd" "localectl" "set-x11-keymap" "us" "" ""
INFO: running "chroot" "/tmp/distinst.NJBJEwtbXwRd" "/usr/bin/env" "-i" "SYSTEMCTL_SKIP_REDIRECT=_" "openvt" "--" "sh" "/etc/init.d/console-setup.sh" "reload"
INFO: running "chroot" "/tmp/distinst.NJBJEwtbXwRd" "ln" "-s" "/etc/console-setup/cached_UTF-8_del.kmap.gz" "/etc/console-setup/cached.kmap.gz"
INFO: running "chroot" "/tmp/distinst.NJBJEwtbXwRd" "update-initramfs" "-u"
INFO: update-initramfs: Generating /boot/initrd.img-5.4.0-62-generic
INFO: starting configuring bootloader step
INFO: /dev/sdd: installing bootloader for Bios
INFO: running "chroot" "/tmp/distinst.NJBJEwtbXwRd" "grub-install" "--recheck" "--target=i386-pc" "/dev/sdd"
WARN: Installing for i386-pc platform.
WARN: grub-install: warning: this GPT partition label contains no BIOS Boot Partition; embedding won't be possible.
WARN: grub-install: warning: Embedding is not possible. GRUB can only be installed in this setup by using blocklists. However, blocklists are UNRELIABLE and their use is discouraged..
WARN: grub-install: error: will not proceed with blocklists.
ERROR: configuring bootloader error: command failed with exit status: exit code: 1
```