Fatal error: Uncaught Error: Class "Spipu\Html2Pdf\Tests\AbstractTest" not found in /var/www/Library-Exercises/01-Library/vendor/spipu/html2pdf/Tests/Image/SrcOkTest.php:20 Stack trace: #0 {main} thrown in /var/www/Library-Exercises/01-Library/vendor/spipu/html2pdf/Tests/Image/SrcOkTest.php on line 20