Fatal error: Uncaught Error: Call to undefined function is_checkout() in /usr/www/users/ctucoracza/wp-content/themes/ctu-training-theme/functions.php:61 Stack trace: #0 /usr/www/users/ctucoracza/wp-includes/class-wp-hook.php(308): wpse_131562_redirect('') #1 /usr/www/users/ctucoracza/wp-includes/class-wp-hook.php(332): WP_Hook->apply_filters(NULL, Array) #2 /usr/www/users/ctucoracza/wp-includes/plugin.php(517): WP_Hook->do_action(Array) #3 /usr/www/users/ctucoracza/wp-includes/template-loader.php(13): do_action('template_redire...') #4 /usr/www/users/ctucoracza/wp-blog-header.php(19): require_once('/usr/www/users/...') #5 /usr/www/users/ctucoracza/index.php(17): require('/usr/www/users/...') #6 {main} thrown in /usr/www/users/ctucoracza/wp-content/themes/ctu-training-theme/functions.php on line 61