Fatal error: Uncaught Error: Class "Symfony\Component\Finder\Comparator\Comparator" not found in C:\mywamp\sites\allsite\calcomposer\vendor\symfony\finder\Comparator\NumberComparator.php:35 Stack trace: #0 {main} thrown in C:\mywamp\sites\allsite\calcomposer\vendor\symfony\finder\Comparator\NumberComparator.php on line 35