mPDF error: IMAGE Error (https://maps.googleapis.com/maps/api/staticmap?center=Benešovská%201148/,%20251%2068%20Kamenice&zoom=14&size=400x300&markers=color:black%7CBenešovská%201148/,%20251%2068%20Kamenice): Error parsing image file - image type not recognised, and not supported by GD imagecreate