Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in D:\xampp\htdocs\ssw_doc\vendor\setasign\fpdi\tests\unit\FpdiTraitTest.php:11 Stack trace: #0 D:\xampp\htdocs\ssw_doc\vendor\setasign\fpdi\tests\unit\FpdfTplTest.php(8): require_once() #1 {main} thrown in D:\xampp\htdocs\ssw_doc\vendor\setasign\fpdi\tests\unit\FpdiTraitTest.php on line 11