mPDF error: IMAGE Error (https://chart.googleapis.com/chart?chs=300x300&cht=qr&chl=https://newenglandautomall.com/cars-for-sale/2004-volkswagen-new-beetle-convertible-gls-wakefield-ri-1847241/&choe=UTF-8): Error parsing image file - image type not recognised, and not supported by GD imagecreate