Can't able to fetch the user location in meteor - meteor

Question

I developed a meteor app in which while registering I am fetching the user location at the client side, to do so I have added the packages listed below:
meteor add mdg:geolocation
meteor add jeremy:geocomplete
meteor aldeed:geocoder
meteor add jaymc:google-reverse-geocode
The code written at client side is as follows:
if (Meteor.isClient) {
Meteor.startup(() => {
GoogleMaps.load({
v: '3.26',
key: '',
libraries: 'geometry,places'
});
console.log("is GoogleMaps.loaded",GooglMaps.loaded());
});
Template.Registration.onRendered(function () {
Tracker.autorun(() => {
if (GoogleMaps.loaded()) {
$('#txt_address').geocomplete({country: "AU", type:
['()']});
}
});
var date = new Date();
$('#div_dob').datetimepicker({
format: 'DD/MM/YYYY',
maxDate : date,
ignoreReadonly: true
});
date=null;
});
Template.Registration.helpers({
location:function(){
$('input[name="txt_address"]').val(Session.get('location'));
}
});
Template.Registration.events({
'click #btn_findlocation':function(event){
alert('Find Location')
event.preventDefault();
function success(position) {
var crd = position.coords;
console.log(`Latitude0 : ${crd.latitude}`);
console.log(`Longitude0: ${crd.longitude}`);
var lat = crd.latitude;
var long = crd.longitude;
reverseGeocode.getLocation(lat, long, function(location)
{
console.log("Address",JSON.stringify(reverseGeocode.getAddrStr()));
Session.set('location', reverseGeocode.getAddrStr());
});
};// end of function success(position)
function error(err) {
console.warn('ERROR(' + err.code + '): ' + err.message);
};//end of function error(err)
// geolocation options
var options = {
enableHighAccuracy: true,
maximumAge: 0
};// end of var options
navigator.geolocation.getCurrentPosition(success, error,
options);
},
})
}
But I am getting false value for GoogleMaps.loaded() function and the following below error when I click a button to fetch the location.
Can't able to read formatted address of undefined.
Results are inconsistent as sometimes I was able to fetch the location other times not.
Please give any suggestions...