Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in /home/interweavesoluti/desktop.interweavesolutions.org/vendor/symfony/validator/Tests/Mapping/Loader/LoaderChainTest.php:18 Stack trace: #0 {main} thrown in /home/interweavesoluti/desktop.interweavesolutions.org/vendor/symfony/validator/Tests/Mapping/Loader/LoaderChainTest.php on line 18