Fatal error: Uncaught Error: Class 'SebastianBergmann\Diff\InvalidArgumentException' not found in /home/kubalos2/public_html/testtestowy/vendor/sebastian/diff/src/Exception/ConfigurationException.php:13 Stack trace: #0 {main} thrown in /home/kubalos2/public_html/testtestowy/vendor/sebastian/diff/src/Exception/ConfigurationException.php on line 13