Fatal error: Uncaught Error: Call to undefined function wp_body_open() in /var/www/clients/client34/web81/web/wp-content/themes/twentytwentyone/header.php:24 Stack trace: #0 /var/www/clients/client34/web81/web/wp-includes/template.php(704): require_once() #1 /var/www/clients/client34/web81/web/wp-includes/template.php(653): load_template('/var/www/client...', true) #2 /var/www/clients/client34/web81/web/wp-includes/general-template.php(41): locate_template(Array, true) #3 /var/www/clients/client34/web81/web/wp-content/themes/twentytwentyone/page.php(12): get_header() #4 /var/www/clients/client34/web81/web/wp-includes/template-loader.php(77): include('/var/www/client...') #5 /var/www/clients/client34/web81/web/wp-blog-header.php(19): require_once('/var/www/client...') #6 /var/www/clients/client34/web81/web/index.php(17): require('/var/www/client...') #7 {main} thrown in /var/www/clients/client34/web81/web/wp-content/themes/twentytwentyone/header.php on line 24