This error execute from functions.php
Fatal error: Cannot redeclare new_excerpt_more() (previously declared in C:\xampp\htdocs\odishaddugkyalumnai\wp-content\themes\odishaddugkyalumnai\functions.php:626) in C:\xampp\htdocs\odishaddugkyalumnai\wp-content\themes\odishaddugkyalumnai\functions.php on line 649
open this file
C:\xampp\htdocs\odishaddugkyalumnai\wp-content\themes\odishaddugkyalumnai\functions.php
and serch for "new_excerpt_more" function and delete it.