Fatal error: Uncaught Error: Class "Ramsey\Collection\Test\TestCase" not found in C:\xampp\htdocs\r10ca\vendor\ramsey\collection\tests\CollectionManipulationTest.php:25 Stack trace: #0 {main} thrown in C:\xampp\htdocs\r10ca\vendor\ramsey\collection\tests\CollectionManipulationTest.php on line 25