Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in /home/flexinettek/public_html/vendor/symfony/css-selector/Tests/Parser/Shortcut/EmptyStringParserTest.php:21 Stack trace: #0 {main} thrown in /home/flexinettek/public_html/vendor/symfony/css-selector/Tests/Parser/Shortcut/EmptyStringParserTest.php on line 21