Fatal error: Uncaught Error: Class "Ramsey\Collection\AbstractCollection" not found in D:\xampp\htdocs\SSWPOS\vendor\ramsey\collection\tests\Mock\BarCollection.php:12 Stack trace: #0 {main} thrown in D:\xampp\htdocs\SSWPOS\vendor\ramsey\collection\tests\Mock\BarCollection.php on line 12