Fatal error: Uncaught Error: Class "Ramsey\Collection\AbstractArray" not found in C:\xampp\htdocs\r10ca\vendor\ramsey\collection\tests\Mock\IntegerArray.php:12 Stack trace: #0 {main} thrown in C:\xampp\htdocs\r10ca\vendor\ramsey\collection\tests\Mock\IntegerArray.php on line 12