Fatal error: Uncaught Error: Call to undefined function is_customize_preview() in /customers/0/1/7/dewymulder.com/httpd.www/wp-content/themes/twentytwentyone/functions.php:321
Stack trace:
#0 /customers/0/1/7/dewymulder.com/httpd.www/wp-includes/plugin.php(470): twenty_twenty_one_setup('')
#1 /customers/0/1/7/dewymulder.com/httpd.www/wp-settings.php(336): do_action('after_setup_the...')
#2 /customers/0/1/7/dewymulder.com/httpd.www/wp-config.php(96): require_once('/customers/0/1/...')
#3 /customers/0/1/7/dewymulder.com/httpd.www/wp-load.php(29): require_once('/customers/0/1/...')
#4 /customers/0/1/7/dewymulder.com/httpd.www/wp-blog-header.php(12): require_once('/customers/0/1/...')
#5 /customers/0/1/7/dewymulder.com/httpd.www/index.php(17): require('/customers/0/1/...')
#6 {main}
  thrown in /customers/0/1/7/dewymulder.com/httpd.www/wp-content/themes/twentytwentyone/functions.php on line 321