Fatal error: Uncaught Mpdf\MpdfException: Invalid size representation "calc(100% - 18px)" in /services/webpages/b/i/bird.ca/public/vendor/mpdf/mpdf/src/SizeConverter.php:35 Stack trace: #0 /services/webpages/b/i/bird.ca/public/vendor/mpdf/mpdf/src/Tag.php(2113): Mpdf\SizeConverter->convert('calc(100% - 18p...', 277.00008333333, 3.8805555555556, false) #1 /services/webpages/b/i/bird.ca/public/vendor/mpdf/mpdf/src/Mpdf.php(15298): Mpdf\Tag->OpenTag('DIV', Array, Array, 33) #2 /services/webpages/b/i/bird.ca/public/get_file.php(126): Mpdf\Mpdf->WriteHTML('<img src="http:...') #3 {main} thrown in /services/webpages/b/i/bird.ca/public/vendor/mpdf/mpdf/src/SizeConverter.php on line 35