Fatal error: Uncaught Error: Call to undefined function body_class() in /home/www/xrtasmania.earth/wp-content/themes/twentytwentyone-child/header.php:23 Stack trace: #0 /home/www/xrtasmania.earth/wp-includes/template.php(770): require_once() #1 /home/www/xrtasmania.earth/wp-includes/template.php(716): load_template('/home/www/xrtas...', true, Array) #2 /home/www/xrtasmania.earth/wp-includes/general-template.php(48): locate_template(Array, true, true, Array) #3 /home/www/xrtasmania.earth/wp-content/themes/twentytwentyone/archive.php(12): get_header() #4 /home/www/xrtasmania.earth/wp-includes/template-loader.php(106): include('/home/www/xrtas...') #5 /home/www/xrtasmania.earth/wp-blog-header.php(19): require_once('/home/www/xrtas...') #6 /home/www/xrtasmania.earth/index.php(17): require('/home/www/xrtas...') #7 {main} thrown in /home/www/xrtasmania.earth/wp-content/themes/twentytwentyone-child/header.php on line 23