Warning: Failed %s type: %s%s, prop, The prop `coordinate.longitude` is marked as required in `MapMarker`, but its value is `null` - react-native-maps

Question

can someone help me why is my marker not showing my location
when I remove lat and lon and replace it with actual latitude and longitude it works. when i console log lat and lon it comes up with the right coords but still has an error
import React from 'react'
import MapView, { Marker, PROVIDER_GOOGLE } from 'react-native-maps'
import { Entypo } from "#expo/vector-icons";
import { Feather } from "#expo/vector-icons";
import { Ionicons } from "#expo/vector-icons";
import { useNavigation } from '#react-navigation/native'
import * as Location from 'expo-location'
import { useState, useEffect } from 'react'
import { API, Auth, graphqlOperation } from 'aws-amplify';
const MapScreen = () => {
const [location, setLocation] = useState(null)
const [errMsg, setErrMsg] = useState(null)
const [lat, setLat] = useState(null)
const [lon, setLon] = useState(null)
useEffect(() => {
(async () => {
let {status } = await Location.requestForegroundPermissionsAsync();
if (status !== 'granted') {
setErrMsg('Location denied!');
return;
}
let location = await Location.getCurrentPositionAsync()
setLocation(location)
setLat(location.coords.latitude)
setLon(location.coords.longitude)
console.log(location)
})();
}, []);
let text = 'Waiting..'
if (errMsg) {
text = errMsg;
} else if (location) {
text = JSON.stringify(location)
console.log(text)
}
const signOut = () => {
Auth.signOut();
};
const navigation = useNavigation()
return (
<View style={{marginTop:33}}>
<MapView
zoomEnabled={true}
provider={PROVIDER_GOOGLE}
style={{width:"100%", height:"100%"}}
initialRegion={{
latitude: -36.8491788,
longitude: 174.7574553,
latitudeDelta: 0.07,
longitudeDelta: 0
}}
>
<Marker
coordinate={{
latitude: lat,
longitude: lon,
}}
onPress={() => navigation.navigate('Home')}
>
</Marker>
</MapView>
i am getting the issue Warning: Failed %s type: %s%s, prop, The prop coordinate.longitude is marked as required in MapMarker, but its value is null.,