mPDF error: IMAGE Error (https://maps.googleapis.com/maps/api/staticmap?center=Nad%20Obchvatem/,%20391%2056%20Tábor&zoom=14&size=650x340&markers=color:black%7CNad%20Obchvatem/,%20391%2056%20Tábor): Error parsing image file - image type not recognised, and not supported by GD imagecreate