Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in /home/phprplacein/public_html/vendor/symfony/dependency-injection/Tests/Dumper/YamlDumperTest.php:21 Stack trace: #0 {main} thrown in /home/phprplacein/public_html/vendor/symfony/dependency-injection/Tests/Dumper/YamlDumperTest.php on line 21