Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in /home/app/htdocs/message_gateway/vendor/phpunit/php-token-stream/tests/Token/ClassTest.php:13 Stack trace: #0 {main} thrown in /home/app/htdocs/message_gateway/vendor/phpunit/php-token-stream/tests/Token/ClassTest.php on line 13