Fatal error: Uncaught Error: Class 'PHPUnit_Framework_TestCase' not found in /home/app/htdocs/lidia/vendor/sabre/xml/tests/Sabre/Xml/ContextStackTest.php:12 Stack trace: #0 {main} thrown in /home/app/htdocs/lidia/vendor/sabre/xml/tests/Sabre/Xml/ContextStackTest.php on line 12