Fatal error: Uncaught Error: Class 'SimpleSAML\Module\core\Auth\Source\AbstractSourceSelector' not found in /var/www/html/simplesamlphp/modules/core/src/Auth/Source/SourceIPSelector.php:21
Stack trace:
#0 {main}
  thrown in /var/www/html/simplesamlphp/modules/core/src/Auth/Source/SourceIPSelector.php on line 21