mPDF error: IMAGE Error (https://chart.googleapis.com/chart?chs=300x300&cht=qr&chl=https://newenglandautomall.com/cars-for-sale/2010-volkswagen-new-beetle-final-edition-pzev-dover-nh-1866876/&choe=UTF-8): Error parsing image file - image type not recognised, and not supported by GD imagecreate