Fatal error: Uncaught Error: Class 'chillerlan\QRCodeTest\QRTestAbstract' not found in /var/www/html/sigo-laravel/vendor/chillerlan/php-qrcode/tests/Data/QRMatrixTest.php:21 Stack trace: #0 {main} thrown in /var/www/html/sigo-laravel/vendor/chillerlan/php-qrcode/tests/Data/QRMatrixTest.php on line 21