Fatal error: Uncaught Error: Class "ComposerAutoloaderInit8abcc6ef8f0a7fe7ba5838c86d87c87a" not found in /var/www/wptbox/wp-content/plugins/wordpress-seo-premium/vendor/autoload.php:7
Stack trace:
#0 /var/www/wptbox/wp-content/plugins/wordpress-seo-premium/wp-seo-premium.php(66): require()
#1 /var/www/wptbox/wp-settings.php(462): include_once('...')
#2 /var/www/wptbox/wp-config.php(89): require_once('...')
#3 /var/www/wptbox/wp-load.php(50): require_once('...')
#4 /var/www/wptbox/wp-blog-header.php(13): require_once('...')
#5 /var/www/wptbox/index.php(17): require('...')
#6 {main}
thrown in /var/www/wptbox/wp-content/plugins/wordpress-seo-premium/vendor/autoload.php on line 7