No idea what the screen says but it looks like the same issue I had when I changes the share from public.
the /etc/samba/overall_share was not in sync and I needed to manually edit it for this and other shares.
if you are comfotable logging in to the system with ssh it is a fairly easy edit. if not I suggest trying a system only restore to see if it will correct it. the system only restore will remove your users but not your shares and data