Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in /var/www/html/api/vendor/vlucas/phpdotenv/tests/Dotenv/DotenvTest.php:16 Stack trace: #0 {main} thrown in /var/www/html/api/vendor/vlucas/phpdotenv/tests/Dotenv/DotenvTest.php on line 16