Google Maps - 'double java.lang.Double.doubleValue()' on a null object reference - IOS

Hi,

I am at the very beginning of implementing google maps to flutter project.
All run ok on ANdroid but when using IOS, looks it has problem with the LatLng i guess…
Error:
java.lang.NullPointerException: Attempt to invoke virtual method ‘double java.lang.Double.doubleValue()’ on a null object reference

The flutter code:

Widget build(BuildContext context) {
return Scaffold(
body: Stack(
children: [
GoogleMap(
initialCameraPosition:
CameraPosition(target: LatLng(50.8466, 4.3528), zoom: 15),
)
],
));
}

ANy help would be appreciated
Thanks in advance
Kind regards