Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in /home/trpdev/public_html/vendor/symfony/var-exporter/Tests/InstantiatorTest.php:17 Stack trace: #0 {main} thrown in /home/trpdev/public_html/vendor/symfony/var-exporter/Tests/InstantiatorTest.php on line 17