Fatal error: Uncaught Error: Call to undefined function wp_optimize_minify_config() in /homepages/45/d152740363/htdocs/ludwig-christian/wp-content/plugins/wp-optimize/includes/class-wp-optimize-updates.php:89 Stack trace: #0 /homepages/45/d152740363/htdocs/ludwig-christian/wp-content/plugins/wp-optimize/includes/class-wp-optimize-updates.php(45): WP_Optimize_Updates::enable_minify_defer() #1 /homepages/45/d152740363/htdocs/ludwig-christian/wp-content/plugins/wp-optimize/wp-optimize.php(1316): WP_Optimize_Updates::check_updates() #2 /homepages/45/d152740363/htdocs/ludwig-christian/wp-content/plugins/wp-optimize/wp-optimize.php(407): WP_Optimize->run_updates() #3 /homepages/45/d152740363/htdocs/ludwig-christian/wp-includes/class-wp-hook.php(298): WP_Optimize->plugins_loaded('') #4 /homepages/45/d152740363/htdocs/ludwig-christian/wp-includes/class-wp-hook.php(323): WP_Hook->apply_filters(NULL, Array) #5 /homepages/45/d152740363/htdocs/ludwig-christian/wp-includes/plugin.php(453): WP_Hook->do_action(Array) #6 /homepages/45/d1 in /homepages/45/d152740363/htdocs/ludwig-christian/wp-content/plugins/wp-optimize/includes/class-wp-optimize-updates.php on line 89