３０歳で転職６回それでも２社からの内定を獲得した方法

Fatal error: Uncaught Error: Call to undefined function is_plugin_active() in /home/xs114023/hoshi-site.com/public_html/wp-content/plugins/rich-table-of-content/functions.php:519 Stack trace: #0 /home/xs114023/hoshi-site.com/public_html/wp-content/plugins/rich-table-of-content/functions.php(653): rtoc_get_index('\n<p>\xE7\xA7\x81\xE3\x81\xAF\xE4\xBA\xBA\xE7\x94...') #1 /home/xs114023/hoshi-site.com/public_html/wp-includes/class-wp-hook.php(308): rtoc_switch_mokuji('\n<p>\xE7\xA7\x81\xE3\x81\xAF\xE4\xBA\xBA\xE7\x94...') #2 /home/xs114023/hoshi-site.com/public_html/wp-includes/plugin.php(205): WP_Hook->apply_filters('\n<p>\xE7\xA7\x81\xE3\x81\xAF\xE4\xBA\xBA\xE7\x94...', Array) #3 /home/xs114023/hoshi-site.com/public_html/wp-includes/post-template.php(255): apply_filters('the_content', '<!-- wp:paragra...') #4 /home/xs114023/hoshi-site.com/public_html/wp-content/themes/jin/single.php(81): the_content() #5 /home/xs114023/hoshi-site.com/public_html/wp-includes/template-loader.php(106): include('/home/xs114023/...') #6 /home/x in /home/xs114023/hoshi-site.com/public_html/wp-content/plugins/rich-table-of-content/functions.php on line 519