Fatal error: Uncaught Error: Undefined constant

When go to https://********/wp-admin/profile.php

Fatal error: Uncaught Error: Undefined constant "FILTER_FLAG_HOST_REQUIRED" in /var/www/*******/wp-content/plugins/wp-biographia/wp-biographia.php:1954 Stack trace: 

#0 /var/www/*******/wp-content/plugins/wp-biographia/wp-biographia.php(1887): WP_Biographia->admin_validate_contacts(1) 

#1 /var/www*******/wp-includes/class-wp-hook.php(324): WP_Biographia->admin_notices('') 

#2 /var/www/*******/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters(NULL, Array) 

#3 /var/www/*******/wp-includes/plugin.php(517): WP_Hook->do_action(Array) 

#4 /var/www/*******/wp-admin/admin-header.php(303): do_action('admin_notices') 

#5 /var/www/*******/wp-admin/user-edit.php(200): require_once('/var/www/******') 

#6 /var/www/*******/wp-admin/profile.php(18): require_once('/var/www/*****') 

#7 {main} thrown in /var/www/************/wp-content/plugins/wp-biographia/wp-biographia.php on line 1954

Fatal error: Uncaught Error: Undefined constant “FILTER_FLAG_HOST_REQUIRED” in /var/www/*******/wp-content/plugins/wp-biographia/wp-biographia.php:1954 Stack trace: #0 /var/www/*******/wp-content/plugins/wp-biographia/wp-biographia.php(1887): WP_Biographia->admin_validate_contacts(1) #1 /var/www*******/wp-includes/class-wp-hook.php(324): WP_Biographia->admin_notices(”) #2 /var/www/*******/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters(NULL, Array) #3 /var/www/*******/wp-includes/plugin.php(517): WP_Hook->do_action(Array) #4 /var/www/*******/wp-admin/admin-header.php(303): do_action(‘admin_notices’) #5 /var/www/*******/wp-admin/user-edit.php(200): require_once(‘/var/www/******’) #6 /var/www/*******/wp-admin/profile.php(18): require_once(‘/var/www/*****’) #7 {main} thrown in /var/www/************/wp-content/plugins/wp-biographia/wp-biographia.php on line 1954

• This topic was modified 2 years, 5 months ago by Doc.
• This topic was modified 2 years, 5 months ago by Doc.

The page I need help with: [log in to see the link]