Warning: Unsupported declare 'strict_types' in C:\Apache24\htdocs\drupal\core\modules\block\src\Plugin\ConfigAction\PlaceBlockDeriver.php on line 3

Fatal error: Class 'Drupal\Component\Plugin\Derivative\DeriverBase' not found in C:\Apache24\htdocs\drupal\core\modules\block\src\Plugin\ConfigAction\PlaceBlockDeriver.php on line 16