Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in /home/app/htdocs/lidia/vendor/symfony/options-resolver/Tests/Debug/OptionsResolverIntrospectorTest.php:19 Stack trace: #0 {main} thrown in /home/app/htdocs/lidia/vendor/symfony/options-resolver/Tests/Debug/OptionsResolverIntrospectorTest.php on line 19