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

Fatal error: Class 'Drupal\Component\Plugin\PluginManagerBase' not found in C:\Apache24\htdocs\drupal\core\tests\Drupal\Tests\Component\Plugin\StubFallbackPluginManager.php on line 20