Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in C:\xampp\htdocs\wordpress\wp-content\plugins\woocommerce\vendor\symfony\css-selector\Tests\CssSelectorConverterTest.php:17 Stack trace: #0 {main} thrown in C:\xampp\htdocs\wordpress\wp-content\plugins\woocommerce\vendor\symfony\css-selector\Tests\CssSelectorConverterTest.php on line 17