Warning: Unsupported declare 'strict_types' in C:\Apache24\htdocs\drupal\core\tests\Drupal\TestSite\TestSiteOliveroInstallTestScript.php on line 3

Fatal error: Interface 'Drupal\TestSite\TestSetupInterface' not found in C:\Apache24\htdocs\drupal\core\tests\Drupal\TestSite\TestSiteOliveroInstallTestScript.php on line 17