The log extract has that entry
May 24 14:38:20 ubuntu subiquity_log.3811[8694]: Installing for x86_64-efi platform. May 24 14:38:20 ubuntu subiquity_log.3811[8694]: grub-install: warning: Cannot set EFI variable Boot0000. May 24 14:38:20 ubuntu subiquity_log.3811[8694]: grub-install: warning: efivarfs_set_variable: writing to fd 8 failed: Invalid argument. May 24 14:38:20 ubuntu subiquity_log.3811[8694]: grub-install: warning: _efi_set_variable_mode: ops->set_variable() failed: Invalid argument. May 24 14:38:20 ubuntu subiquity_log.3811[8694]: grub-install: error: failed to register the EFI boot entry: Invalid argument.
but there might be extra context earlier in the log
The log extract has that entry
May 24 14:38:20 ubuntu subiquity_ log.3811[ 8694]: Installing for x86_64-efi platform. log.3811[ 8694]: grub-install: warning: Cannot set EFI variable Boot0000. log.3811[ 8694]: grub-install: warning: efivarfs_ set_variable: writing to fd 8 failed: Invalid argument. log.3811[ 8694]: grub-install: warning: _efi_set_ variable_ mode: ops->set_variable() failed: Invalid argument. log.3811[ 8694]: grub-install: error: failed to register the EFI boot entry: Invalid argument.
May 24 14:38:20 ubuntu subiquity_
May 24 14:38:20 ubuntu subiquity_
May 24 14:38:20 ubuntu subiquity_
May 24 14:38:20 ubuntu subiquity_
but there might be extra context earlier in the log