Fatal error: Uncaught Error: Class 'WP_Tax_Query' not found in /var/www/html/wp-includes/class-wp-query.php:1401 Stack trace: #0 /var/www/html/wp-includes/class-wp-query.php(961): WP_Query->parse_tax_query(Array) #1 /var/www/html/wp-includes/class-wp-query.php(1897): WP_Query->parse_query() #2 /var/www/html/wp-includes/class-wp-query.php(3949): WP_Query->get_posts() #3 /var/www/html/wp-includes/post.php(6471): WP_Query->query(Array) #4 /var/www/html/wp-includes/post-template.php(726): get_pages(Array) #5 /var/www/html/wp-includes/post-template.php(622): get_body_class('') #6 /var/www/html/wp-content/themes/spearhead/header.php(26): body_class() #7 /var/www/html/wp-includes/template.php(810): require_once('/var/www/html/w...') #8 /var/www/html/wp-includes/template.php(745): load_template('/var/www/html/w...', true, Array) #9 /var/www/html/wp-includes/general-template.php(48): locate_template(Array, true, true, Array) #10 /var/www/html/wp-content/themes/seedlet/page.php(11): get_header() #11 /var/www/html/wp-includes/templa in /var/www/html/wp-includes/class-wp-query.php on line 1401