Fatal error: Uncaught Error: Interface "Spipu\Html2Pdf\Extension\ExtensionInterface" not found in /var/www/Library-Exercises/01-Library/vendor/spipu/html2pdf/src/Extension/AbstractExtension.php:19 Stack trace: #0 {main} thrown in /var/www/Library-Exercises/01-Library/vendor/spipu/html2pdf/src/Extension/AbstractExtension.php on line 19