Fatal error: Uncaught Error: Call to undefined function is_parent_slug() in /var/www/vhosts/ikeba-lc.net/testsite.ikeba-lc.net/wp-content/themes/Ikeba/functions.php:27
Stack trace:
#0 /var/www/vhosts/ikeba-lc.net/testsite.ikeba-lc.net/wp-includes/class-wp-hook.php(286): imagepassshort(' \xE6\x98\xA8\xE5\xA4\x9C\xE3\x81\xAE\xE5\xA4\x9C\xE5\x8B...')
#1 /var/www/vhosts/ikeba-lc.net/testsite.ikeba-lc.net/wp-includes/plugin.php(203): WP_Hook->apply_filters(' \xE6\x98\xA8\xE5\xA4\x9C\xE3\x81\xAE\xE5\xA4\x9C\xE5\x8B...', Array)
#2 /var/www/vhosts/ikeba-lc.net/testsite.ikeba-lc.net/wp-includes/post-template.php(240): apply_filters('the_content', ' \xE6\x98\xA8\xE5\xA4\x9C\xE3\x81\xAE\xE5\xA4\x9C\xE5\x8B...')
#3 /var/www/vhosts/ikeba-lc.net/testsite.ikeba-lc.net/wp-content/themes/Ikeba/single-blog.php(21): the_content()
#4 /var/www/vhosts/ikeba-lc.net/testsite.ikeba-lc.net/wp-includes/template.php(690): require('/var/www/vhosts...')
#5 /var/www/vhosts/ikeba-lc.net/testsite.ikeba-lc.net/wp-includes/template.php(647): load_template( in /var/www/vhosts/ikeba-lc.net/testsite.ikeba-lc.net/wp-content/themes/Ikeba/functions.php on line 27