Fatal error: Uncaught Error: Call to undefined function is_plugin_active() in /home/adventure88/gundamwalker.com/public_html/wp-content/plugins/rich-table-of-content/functions.php:519 Stack trace: #0 /home/adventure88/gundamwalker.com/public_html/wp-content/plugins/rich-table-of-content/functions.php(1380): rtoc_get_index('<h2 id="rtoc-1"...') #1 /home/adventure88/gundamwalker.com/public_html/wp-includes/class-wp-hook.php(308): rtoc_switch_mokuji('<h2 id="rtoc-1"...') #2 /home/adventure88/gundamwalker.com/public_html/wp-includes/plugin.php(205): WP_Hook->apply_filters('<h2>HGUC \xE3\x83\x87\xE3\x82\xA3...', Array) #3 /home/adventure88/gundamwalker.com/public_html/wp-includes/formatting.php(3928): apply_filters('the_content', '\r\n<h2>HGUC \xE3\x83\x87\xE3...') #4 /home/adventure88/gundamwalker.com/public_html/wp-includes/class-wp-hook.php(308): wp_trim_excerpt('\r\n<h2>HGUC \xE3\x83\x87\xE3...', Object(WP_Post)) #5 /home/adventure88/gundamwalker.com/public_html/wp-includes/plugin.php(205): WP_Hook->apply_filters('', Array in /home/adventure88/gundamwalker.com/public_html/wp-content/plugins/rich-table-of-content/functions.php on line 519