Warning: Unsupported declare 'strict_types' in C:\Apache24\htdocs\drupal\core\tests\Drupal\Tests\Core\Plugin\Fixtures\InheritedContextDefinition.php on line 3

Fatal error: Class 'Drupal\Core\Plugin\Context\ContextDefinition' not found in C:\Apache24\htdocs\drupal\core\tests\Drupal\Tests\Core\Plugin\Fixtures\InheritedContextDefinition.php on line 14