mPDF Error

Error: HTTP error: 403

#0 /etc/httpd/conf/vendor/mpdf/mpdf/src/Image/ImageProcessor.php(231): Mpdf\RemoteContentFetcher->getFileContentsByCurl()
#1 /etc/httpd/conf/vendor/mpdf/mpdf/src/Tag/Img.php(276): Mpdf\Image\ImageProcessor->getImage()
#2 /etc/httpd/conf/vendor/mpdf/mpdf/src/Tag.php(240): Mpdf\Tag\Img->open()
#3 /etc/httpd/conf/vendor/mpdf/mpdf/src/Mpdf.php(13812): Mpdf\Tag->OpenTag()
#4 /home/internet/newera/eradoc/eradocPDF_OCR.php(119): Mpdf\Mpdf->WriteHTML()
#5 {main}