Fatal error: Uncaught Error: Cannot unset string offsets in /www/htdocs/w009659b/wp-includes/cron.php:513 Stack trace: #0 /www/htdocs/w009659b/wp-content/plugins/wordpress-seo/inc/class-upgrade.php(840): wp_unschedule_hook('wpseo_cleanup_o...') #1 /www/htdocs/w009659b/wp-content/plugins/wordpress-seo/inc/class-upgrade.php(116): WPSEO_Upgrade->upgrade_172('17.1') #2 [internal function]: WPSEO_Upgrade->run_upgrade_routine('upgrade_172', '17.2-RC0', '17.1') #3 /www/htdocs/w009659b/wp-content/plugins/wordpress-seo/inc/class-upgrade.php(80): array_walk(Array, Array, '17.1') #4 /www/htdocs/w009659b/wp-content/plugins/wordpress-seo/wp-seo-main.php(328): WPSEO_Upgrade->__construct() #5 /www/htdocs/w009659b/wp-includes/class-wp-hook.php(287): wpseo_init('') #6 /www/htdocs/w009659b/wp-includes/class-wp-hook.php(311): WP_Hook->apply_filters(NULL, Array) #7 /www/htdocs/w009659b/wp-includes/plugin.php(484): WP_Hook->do_action(Array) #8 /www/htdocs/w009659b/wp-settings.php(420): do_action('plugins_loaded') #9 /www/htdocs/w009659b/wp-co in /www/htdocs/w009659b/wp-includes/cron.php on line 513