mPDF error: IMAGE Error (https://chart.googleapis.com/chart?chs=300x300&cht=qr&chl=https://newenglandautomall.com/cars-for-sale/2018-jeep-wrangler-jk-unlimited-altitude-south-paris-me-1787916/&choe=UTF-8): Error parsing image file - image type not recognised, and not supported by GD imagecreate