Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in C:\laragon\www\erp-app\vendor\theseer\tokenizer\tests\XMLSerializerTest.php:12 Stack trace: #0 {main} thrown in C:\laragon\www\erp-app\vendor\theseer\tokenizer\tests\XMLSerializerTest.php on line 12