Trapped at grub rescue (urgent help needed)

Bro first thing to note
My system is not UEFI it is legacy
So what I did was booted into a live Zorin environment and installed boot repair and let it complete and rebooted it worked I can access the system now

BUT
Now my system configuration was all off (i have managed to get back everything)

But now the problem is login screen wallpaper is not changing. I have tried using lightdm setting but it still does not change how to solve that
Bro even the Zorin appearance is not launching
This is the error while launching zorin appearance through terminal

WARNING:root:Shell not installed or running
Traceback (most recent call last):
  File "/usr/bin/zorin-appearance", line 11, in <module>
    load_entry_point('zorin-appearance==4.1', 'gui_scripts', 'zorin-appearance')()
  File "/usr/lib/python3/dist-packages/zorin_appearance/__main__.py", line 161, in main
    window = ZorinAppearance()
  File "/usr/lib/python3/dist-packages/zorin_appearance/__main__.py", line 129, in __init__
    desktop_box.add(desktop.Icons())
  File "/usr/lib/python3/dist-packages/zorin_appearance/desktop.py", line 70, in __init__
    self.selection_box.add(widgets.Switch(_('Icons on Desktop'),
  File "/usr/lib/python3/dist-packages/zorin_appearance/widgets.py", line 70, in __init__
    XFCONF.xfconf.GetProperty(self.schema,
  File "/usr/lib/python3/dist-packages/dbus/proxies.py", line 141, in __call__
    return self._connection.call_blocking(self._named_service,
  File "/usr/lib/python3/dist-packages/dbus/connection.py", line 652, in call_blocking
    reply_message = self.send_message_with_reply_and_block(
dbus.exceptions.DBusException: org.xfce.Xfconf.Error.PropertyNotFound: Property "/desktop-icons/style" does not exist on channel "xfce4-desktop"