Warning: include(/homepages/20/d842185359/htdocs/clickandbuilds/IsmeGmbH/wp-content/plugins/wordpress-seo/vendor/composer/../../lib/abstract-main.php): failed to open stream: No such file or directory in /homepages/20/d842185359/htdocs/clickandbuilds/IsmeGmbH/wp-content/plugins/polylang/vendor/composer/ClassLoader.php on line 444

Warning: include(): Failed opening '/homepages/20/d842185359/htdocs/clickandbuilds/IsmeGmbH/wp-content/plugins/wordpress-seo/vendor/composer/../../lib/abstract-main.php' for inclusion (include_path='.:/usr/lib/php7.4') in /homepages/20/d842185359/htdocs/clickandbuilds/IsmeGmbH/wp-content/plugins/polylang/vendor/composer/ClassLoader.php on line 444

Fatal error: Uncaught Error: Class 'Yoast\WP\Lib\Abstract_Main' not found in /homepages/20/d842185359/htdocs/clickandbuilds/IsmeGmbH/wp-content/plugins/wordpress-seo/src/main.php:25 Stack trace: #0 /homepages/20/d842185359/htdocs/clickandbuilds/IsmeGmbH/wp-content/plugins/polylang/vendor/composer/ClassLoader.php(444): include() #1 /homepages/20/d842185359/htdocs/clickandbuilds/IsmeGmbH/wp-content/plugins/polylang/vendor/composer/ClassLoader.php(322): Composer\Autoload\includeFile('/homepages/20/d...') #2 [internal function]: Composer\Autoload\ClassLoader->loadClass('Yoast\\WP\\SEO\\Ma...') #3 /homepages/20/d842185359/htdocs/clickandbuilds/IsmeGmbH/wp-content/plugins/wordpress-seo/src/functions.php(35): spl_autoload_call('Yoast\\WP\\SEO\\Ma...') #4 /homepages/20/d842185359/htdocs/clickandbuilds/IsmeGmbH/wp-content/plugins/wordpress-seo/wp-seo-main.php(489): YoastSEO() #5 /homepages/20/d842185359/htdocs/clickandbuilds/IsmeGmbH/wp-content/plugins/wordpress-seo/wp-seo.php(50): require_once('/homepages/20/d...') #6 /homepages/ in /homepages/20/d842185359/htdocs/clickandbuilds/IsmeGmbH/wp-content/plugins/wordpress-seo/src/main.php on line 25