Fatal error: Uncaught Error: Class 'Concrete\Core\Console\Command' not found in /srv/www/c5www/html/updates/concrete5-8.5.1/concrete/src/Console/Command/GenerateSitemapCommand.php:16 Stack trace: #0 {main} thrown in /srv/www/c5www/html/updates/concrete5-8.5.1/concrete/src/Console/Command/GenerateSitemapCommand.php on line 16