Fatal error: Uncaught Error: Method MarkupMinifierWP_MarkupMinifier::__toString() must return a string value in /var/www/vhosts/warhnvbf.host245.checkdomain.de/organiceme/wp-includes/functions.php:5309 Stack trace: #0 /var/www/vhosts/warhnvbf.host245.checkdomain.de/organiceme/wp-includes/functions.php(5309): ob_end_flush() #1 /var/www/vhosts/warhnvbf.host245.checkdomain.de/organiceme/wp-includes/class-wp-hook.php(308): wp_ob_end_flush_all('') #2 /var/www/vhosts/warhnvbf.host245.checkdomain.de/organiceme/wp-includes/class-wp-hook.php(332): WP_Hook->apply_filters('', Array) #3 /var/www/vhosts/warhnvbf.host245.checkdomain.de/organiceme/wp-includes/plugin.php(517): WP_Hook->do_action(Array) #4 /var/www/vhosts/warhnvbf.host245.checkdomain.de/organiceme/wp-includes/load.php(1144): do_action('shutdown') #5 [internal function]: shutdown_action_hook() #6 {main} thrown in /var/www/vhosts/warhnvbf.host245.checkdomain.de/organiceme/wp-includes/functions.php on line 5309