mPDF error: IMAGE Error (https://maps.googleapis.com/maps/api/staticmap?center=Na%20Praze/,%20Planá%20nad%20Lužnicí&zoom=14&size=650x340&markers=color:black%7CNa%20Praze/,%20Planá%20nad%20Lužnicí): Error parsing image file - image type not recognised, and not supported by GD imagecreate