Fatal error: Uncaught Error: Class "Rap2hpoutre\FastExcel\Tests\TestCase" not found in C:\xampp\htdocs\shopLogic\vendor\rap2hpoutre\fast-excel\tests\ChunkTest.php:10 Stack trace: #0 {main} thrown in C:\xampp\htdocs\shopLogic\vendor\rap2hpoutre\fast-excel\tests\ChunkTest.php on line 10