Fatal error: Uncaught Error: Interface "SebastianBergmann\GlobalState\Exception" not found in C:\mywamp\sites\allsite\calcomposer\vendor\sebastian\global-state\src\RuntimeException.php:15 Stack trace: #0 {main} thrown in C:\mywamp\sites\allsite\calcomposer\vendor\sebastian\global-state\src\RuntimeException.php on line 15