Fatal error: Uncaught Error: Call to undefined function MarkupMarkdown\Core\wp_is_rest_endpoint() in /home/web13c/bistro.site/public_html/wp-content/plugins/markup-markdown/MarkupMarkdown/Core/Support.php:204 Stack trace: #0 /home/web13c/bistro.site/public_html/wp-includes/class-wp-hook.php(324): MarkupMarkdown\Core\Support->post_markdown2html('<h2>\xE5\x89\x8D\xE6\x8F\x90</h2>...') #1 /home/web13