【Ubuntu22.04】解決 : ディレクトリ /var/lib/apt/lists/ をロックできません
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('##apt\xE9\x96\xA2\xE4\xBF\x82\xE3\x81\xAE\xE3...') #1 /home/web13c/bistro.site/public_html/wp-includes/plugin.php(205): WP_Hook->apply_filters('##apt\xE9\x96\xA2\xE4\xBF\x82\xE3\x81\xAE\xE3...', Array) #2 /home/web13c/bistro.site/public_html/wp-content/themes/luxeritas/inc/filters.php(292): apply_filters('the_content', '##apt\xE9\x96\xA2\xE4\xBF\x82\xE3\x81\xAE\xE3...') #3 /home/web13c/bistro.site/public_html/wp-includes/class-wp-hook.php(324): {closure}('##apt\xE9\x96\xA2\xE4\xBF\x82\xE3\x81\xAE\xE3...') #4 /home/web13c/bistro.site/public_html/wp-includes/plugin.php(205): WP_Hook->apply_filters('', Array) #5 /home/web13c/bistro.site/public_html/wp-content/themes/luxeritas/single.p in /home/web13c/bistro.site/public_html/wp-content/plugins/markup-markdown/MarkupMarkdown/Core/Support.php on line 204