Fatal error: Uncaught TypeError: Return value of Composer\Autoload\ClassLoader::initializeIncludeClosure() must be an instance of Composer\Autoload\void, none returned in /homepages/31/d664411019/htdocs/clickandbuilds/AssociationDuval/wp-content/plugins/meta-box/vendor/composer/ClassLoader.php:580 Stack trace: #0 /homepages/31/d664411019/htdocs/clickandbuilds/AssociationDuval/wp-content/plugins/meta-box/vendor/composer/ClassLoader.php(112): Composer\Autoload\ClassLoader::initializeIncludeClosure() #1 /homepages/31/d664411019/htdocs/clickandbuilds/AssociationDuval/wp-content/plugins/meta-box/vendor/composer/autoload_real.php(26): Composer\Autoload\ClassLoader->__construct('/homepages/31/d...') #2 /homepages/31/d664411019/htdocs/clickandbuilds/AssociationDuval/wp-content/plugins/meta-box/vendor/autoload.php(25): ComposerAutoloaderInit66983e14f2631207071f6f30c7c3de9c::getLoader() #3 /homepages/31/d664411019/htdocs/clickandbuilds/AssociationDuval/wp-content/plugins/meta-box/inc/loader.php(65): require('/homepages/31/d...') #4 in /homepages/31/d664411019/htdocs/clickandbuilds/AssociationDuval/wp-content/plugins/meta-box/vendor/composer/ClassLoader.php on line 580