Call to a member function getData() on null in Dompdf\Cpdf->processFont()

Problem/Motivation

Error: Call to a member function getData() on null in Dompdf\Cpdf->processFont() (line 1276 of /home/homepeteuthanasia/web/dev.homepeteuthanasia.com/app/vendor/dompdf/dompdf/lib/Cpdf.php).