I am getting an error while login to my admin page. I have identified the below error. Please urgently help me to resolve this issue
Fatal error: Uncaught Error: Call to undefined function wp_is_recovery_mode() in /home/vol3_3/epizy.com/epiz_21408510/htdocs/wp-admin/admin-header.php:55 Stack trace: #0 /home/vol3_3/epizy.com/epiz_21408510/htdocs/wp-admin/index.php(111): include() #1 {main} thrown in /home/vol3_3/epizy.com/epiz_21408510/htdocs/wp-admin/admin-header.php on line 55