Error

Call to a member function getPostsAllData() on null

Details

File: /var/www/html/wordpress/wp-content/themes/generatepress-child/single.php
Line: 251

Stack trace:
#0 /var/www/html/wordpress/wp-includes/template-loader.php(106): include()
#1 /var/www/html/wordpress/wp-blog-header.php(19): require_once('...')
#2 /var/www/html/wordpress/index.php(17): require('...')
#3 {main}