Ionic app problem using google maps api

I’m using Javascript google maps api and everythings works perfectly, but im when im trying to draw a circle it doesn’t display at all, event i copied the demo code of the google maps api and same, not showing circles

my code:

async addCircleCurrentPosition(position: google.maps.LatLngLiteral) {
const map : google.maps.Map = this.newMap;
const center = new google.maps.LatLng(, position.lng);
const circleOptions : google.maps.CircleOptions = {
strokeColor: “#FF0000”,
strokeOpacity: 0.8,
strokeWeight: 2,
fillColor: “#FF0000”,
fillOpacity: 0.35,
center: center,
radius: 50*1609.34,
const circle : google.maps.Circle = new google.maps.Circle(circleOptions)