Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in /home/app/htdocs/lidia/vendor/symfony/var-dumper/Tests/Caster/CasterTest.php:21 Stack trace: #0 {main} thrown in /home/app/htdocs/lidia/vendor/symfony/var-dumper/Tests/Caster/CasterTest.php on line 21