mPDF error: IMAGE Error (https://maps.googleapis.com/maps/api/staticmap?center=Na%20Výsluní%203385/,%20276%2001%20Mělník&zoom=14&size=400x300&markers=color:black%7CNa%20Výsluní%203385/,%20276%2001%20Mělník): Error parsing image file - image type not recognised, and not supported by GD imagecreate