Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in /home/cooplafobq/newplanning/vendor/spipu/html2pdf/Tests/CrossVersionCompatibility/PhpUnit9/CssConverterTestCase.php:8 Stack trace: #0 {main} thrown in /home/cooplafobq/newplanning/vendor/spipu/html2pdf/Tests/CrossVersionCompatibility/PhpUnit9/CssConverterTestCase.php on line 8