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