* Student Admission fix
* adding check for application
* adding check for application
* updating error message
* added date_diff for date comparision
(cherry picked from commit c6592c880a)
Co-authored-by: Anupam Kumar <anupamvns0099@gmail.com>
Co-authored-by: Anurag Mishra <32095923+Anurag810@users.noreply.github.com>