Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in C:\Landaweb\webs\landaweb\backend\vendor\sendgrid\php-http-client\test\unit\ClientTest.php:9 Stack trace: #0 {main} thrown in C:\Landaweb\webs\landaweb\backend\vendor\sendgrid\php-http-client\test\unit\ClientTest.php on line 9