Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in /home/edmedu/www/edmclass.com.bak/edmclass-front/vendor/league/oauth1-client/tests/XingServerTest.php:12 Stack trace: #0 {main} thrown in /home/edmedu/www/edmclass.com.bak/edmclass-front/vendor/league/oauth1-client/tests/XingServerTest.php on line 12