Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in C:\xampp\htdocs\astra-backoffice\vendor\egulias\email-validator\tests\EmailValidator\EmailValidatorTest.php:12 Stack trace: #0 {main} thrown in C:\xampp\htdocs\astra-backoffice\vendor\egulias\email-validator\tests\EmailValidator\EmailValidatorTest.php on line 12