Warning: include(/mnt/web507/d0/39/510440339/htdocs/WordPress_01/wp-content/plugins/wordpress-seo/vendor/composer/../../lib/abstract-main.php): failed to open stream: No such file or directory in /mnt/web507/d0/39/510440339/htdocs/WordPress_01/wp-content/plugins/polylang/vendor/composer/ClassLoader.php on line 576

Warning: include(): Failed opening '/mnt/web507/d0/39/510440339/htdocs/WordPress_01/wp-content/plugins/wordpress-seo/vendor/composer/../../lib/abstract-main.php' for inclusion (include_path='.:/opt/RZphp74/includes') in /mnt/web507/d0/39/510440339/htdocs/WordPress_01/wp-content/plugins/polylang/vendor/composer/ClassLoader.php on line 576

Fatal error: Uncaught Error: Class 'Yoast\WP\Lib\Abstract_Main' not found in /mnt/web507/d0/39/510440339/htdocs/WordPress_01/wp-content/plugins/wordpress-seo/src/main.php:25
Stack trace:
#0 /mnt/web507/d0/39/510440339/htdocs/WordPress_01/wp-content/plugins/polylang/vendor/composer/ClassLoader.php(576): include()
#1 /mnt/web507/d0/39/510440339/htdocs/WordPress_01/wp-content/plugins/polylang/vendor/composer/ClassLoader.php(427): Composer\Autoload\{closure}()
#2 [internal function]: Composer\Autoload\ClassLoader->loadClass()
#3 /mnt/web507/d0/39/510440339/htdocs/WordPress_01/wp-content/plugins/wordpress-seo/src/functions.php(33): spl_autoload_call()
#4 /mnt/web507/d0/39/510440339/htdocs/WordPress_01/wp-content/plugins/wordpress-seo/wp-seo-main.php(445): YoastSEO()
#5 /mnt/web507/d0/39/510440339/htdocs/WordPress_01/wp-content/plugins/wordpress-seo/wp-seo.php(50): require_once('/mnt/web507/d0/...')
#6 /mnt/web507/d0/39/510440339/htdocs/WordPress_01/wp-settings.php(545): include_once('/mnt/web507/d0/...')
#7 /mnt/web507/d0/39/5 in /mnt/web507/d0/39/510440339/htdocs/WordPress_01/wp-content/plugins/wordpress-seo/src/main.php on line 25