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Fatal error: Uncaught TypeError: Argument 2 passed to Dompdf\FrameDecorator\AbstractFrameDecorator::insert_child_before() must be an instance of Dompdf\Frame, null given, called in /home/users/manex/public_html/manex.com.pl/wp-content/themes/manex/phplibs/dompdf/src/FrameReflower/Page.php on line 129 and defined in /home/users/manex/public_html/manex.com.pl/wp-content/themes/manex/phplibs/dompdf/src/FrameDecorator/AbstractFrameDecorator.php:355 Stack trace: #0 /home/users/manex/public_html/manex.com.pl/wp-content/themes/manex/phplibs/dompdf/src/FrameReflower/Page.php(129): Dompdf\FrameDecorator\AbstractFrameDecorator->insert_child_before(Object(Dompdf\FrameDecorator\Block), NULL) #1 /home/users/manex/public_html/manex.com.pl/wp-content/themes/manex/phplibs/dompdf/src/FrameDecorator/AbstractFrameDecorator.php(801): Dompdf\FrameReflower\Page->reflow(NULL) #2 /home/users/manex/public_html/manex.com.pl/wp-content/themes/manex/phplibs/dompdf/src/Dompdf.php(834): Dompdf\FrameDecorator\AbstractFrameDecorator->reflow() #3 /home/u in /home/users/manex/public_html/manex.com.pl/wp-content/themes/manex/phplibs/dompdf/src/FrameDecorator/AbstractFrameDecorator.php on line 355