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 /home/irisow15/public_html/cdn/Dompdf/src/Frame/FrameTree.php on line 138