error: will not proceed with blocklists

[Victor]

May 02 20:28:15 ubuntu-studio subiquity_log.3464[7546]: Unexpected error while running command.
May 02 20:28:15 ubuntu-studio subiquity_log.3464[7546]: Command: ['unshare', '--fork', '--pid', '--mount-proc=/target/proc', '--', 'chroot', '/target', 'grub-install', '/dev/sda']
May 02 20:28:15 ubuntu-studio subiquity_log.3464[7546]: Exit code: 1
May 02 20:28:15 ubuntu-studio subiquity_log.3464[7546]: Reason: -
May 02 20:28:15 ubuntu-studio subiquity_log.3464[7546]: Stdout: ''
May 02 20:28:15 ubuntu-studio subiquity_log.3464[7546]: Stderr: Installing for i386-pc platform.
May 02 20:28:15 ubuntu-studio subiquity_log.3464[7546]: grub-install: warning: this GPT partition label contains no BIOS Boot Partition; embedding won't be possible.
May 02 20:28:15 ubuntu-studio subiquity_log.3464[7546]: 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..
May 02 20:28:15 ubuntu-studio subiquity_log.3464[7546]: grub-install: error: will not proceed with blocklists.
May 02 20:28:15 ubuntu-studio subiquity_log.3464[7546]:
May 02 20:28:15 ubuntu-studio subiquity_log.3464[7546]:
May 02 20:28:15 ubuntu-studio subiquity_log.3464[7546]: Stderr: ''
May 02 20:28:15 ubuntu-studio subiquity_event.3464[3464]:
May 02 20:28:16 ubuntu-studio subiquity_event.3464[3464]: curtin command install