Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in D:\xampp\htdocs\SSWPOS\vendor\google\common-protos\tests\Unit\InstantiateClassesTest.php:41 Stack trace: #0 {main} thrown in D:\xampp\htdocs\SSWPOS\vendor\google\common-protos\tests\Unit\InstantiateClassesTest.php on line 41