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('<p>\xE3\x81\xA9\xE3\x81\x86\xE3\x82\x82\xE3\x82\xAC...') #1 /home/adventure88/gundamwalker.com/public_html/wp-includes/class-wp-hook.php(308): rtoc_switch_mokuji('<p>\xE3\x81\xA9\xE3\x81\x86\xE3\x82\x82\xE3\x82\xAC...') #2 /home/adventure88/gundamwalker.com/public_html/wp-includes/plugin.php(205): WP_Hook->apply_filters('<p>\xE3\x81\xA9\xE3\x81\x86\xE3\x82\x82\xE3\x82\xAC...', Array) #3 /home/adventure88/gundamwalker.com/public_html/wp-includes/formatting.php(3928): apply_filters('the_content', '\n\n\n<p>\xE3\x81\xA9\xE3\x81\x86\xE3\x82\x82...') #4 /home/adventure88/gundamwalker.com/public_html/wp-includes/class-wp-hook.php(308): wp_trim_excerpt('\n\n\n<p>\xE3\x81\xA9\xE3\x81\x86\xE3\x82\x82...', Object in /home/adventure88/gundamwalker.com/public_html/wp-content/plugins/rich-table-of-content/functions.php on line 519