A serious issue caused while upgrading from Zorin os 16 to 17

Hey guys , I was upgrading my dad's computer from Zorin os 16 to 17 . It took a long time , later when I saw , the upgrade app was stuck , infact the wbkle system from freezed . I have taken a backup using the backup tool that comes pre-installed. Currently it's not booting . It gives two errors. First image shows when trying to normaly boot and second when in recovery. For now I am using love USB to fix os with the option that comes .

Pls help me out :sob:

Now when I try to boot after using boot repair. It shows this

Boot your Zorin installation USB.
Find grub repair (boot repair) and run that to see if it sorts boot conditions for you.