Fatal error: Uncaught Error: Call to undefined function is_plugin_active() in /home/nushin/nushin1125.com/public_html/wp-content/plugins/rich-table-of-content/functions.php:519 Stack trace: #0 /home/nushin/nushin1125.com/public_html/wp-content/plugins/rich-table-of-content/functions.php(653): rtoc_get_index('<!-- PRyC WP: A...') #1 /home/nushin/nushin1125.com/public_html/wp-includes/class-wp-hook.php(303): rtoc_switch_mokuji('<!-- PRyC WP: A...') #2 /home/nushin/nushin1125.com/public_html/wp-includes/plugin.php(189): WP_Hook->apply_filters('<!-- PRyC WP: A...', Array) #3 /home/nushin/nushin1125.com/public_html/wp-includes/formatting.php(3851): apply_filters('the_content', '<p class="p1"><...') #4 /home/nushin/nushin1125.com/public_html/wp-includes/class-wp-hook.php(303): wp_trim_excerpt('<p class="p1"><...', Object(WP_Post)) #5 /home/nushin/nushin1125.com/public_html/wp-includes/plugin.php(189): WP_Hook->apply_filters('', Array) #6 /home/nushin/nushin1125.com/public_html/wp-includes/post-template.php(429): apply_filters(' in /home/nushin/nushin1125.com/public_html/wp-content/plugins/rich-table-of-content/functions.php on line 519