mPDF error: IMAGE Error (https://chart.googleapis.com/chart?chs=300x300&cht=qr&chl=https://newenglandautomall.com/cars-for-sale/2016-nissan-frontier-sl-crew-cab-5at-4wd-turner-me-1791606/&choe=UTF-8): Error parsing image file - image type not recognised, and not supported by GD imagecreate