Fatal error: Uncaught Error: Class "SebastianBergmann\Comparator\ObjectComparator" not found in /home/wwwarms/ws.arms-tools.com/websocket-server/vendor/sebastian/comparator/src/MockObjectComparator.php:20 Stack trace: #0 {main} thrown in /home/wwwarms/ws.arms-tools.com/websocket-server/vendor/sebastian/comparator/src/MockObjectComparator.php on line 20