Fatal error: Could not check compatibility between Dompdf\Frame\FrameTree::getIterator(): Dompdf\Frame\FrameTreeIterator and IteratorAggregate::getIterator(): Traversable, because class Dompdf\Frame\FrameTreeIterator is not available in C:\xampp\htdocs\binusman\dompdf\dompdf-master\src\Frame\FrameTree.php on line 138