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