Fatal error: Uncaught Error: Class 'Ratchet\AbstractMessageComponentTestCase' not found in /var/www/html/stz-api/vendor/cboden/ratchet/tests/unit/Wamp/WampServerTest.php:8 Stack trace: #0 {main} thrown in /var/www/html/stz-api/vendor/cboden/ratchet/tests/unit/Wamp/WampServerTest.php on line 8