GetFusedLocationProviderClient returning null latitude and longitude values for users' location

For an app I'm making, I need to get the users' location which will then be displayed on the map.

To achieve this, I am using LocationServices.getFusedLocationProviderClient() in the code below.

When I get the location value in addOnSuccessListener, the latitude and longtitude values are null for some reason, so I'm getting a NullPointerException:

import android.Manifest
import android.annotation.SuppressLint
import android.location.Location
import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import androidx.core.app.ActivityCompat
import com.google.android.gms.location.FusedLocationProviderClient
import com.google.android.gms.location.LocationServices
import com.google.android.gms.maps.CameraUpdateFactory
import com.google.android.gms.maps.GoogleMap
import com.google.android.gms.maps.OnMapReadyCallback
import com.google.android.gms.maps.SupportMapFragment
import com.google.android.gms.maps.model.LatLng
import com.google.android.gms.maps.model.MarkerOptions
import com.google.android.material.dialog.MaterialAlertDialogBuilder
import com.realtomjoney.mapsapp.databinding.ActivityMainBinding
import java.lang.NullPointerException

class MainActivity : AppCompatActivity(), OnMapReadyCallback {
    private lateinit var binding: ActivityMainBinding

    lateinit var myMap: GoogleMap

    lateinit var fusedLocation: FusedLocationProviderClient

    @SuppressLint("MissingPermission")
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)

        binding = ActivityMainBinding.inflate(layoutInflater)
        setContentView(binding.root)

        ActivityCompat.requestPermissions(this, arrayOf(
            Manifest.permission.ACCESS_FINE_LOCATION,
            Manifest.permission.ACCESS_COARSE_LOCATION) , 100)

        val mapFragment = supportFragmentManager
            .findFragmentById(R.id.map) as SupportMapFragment
        mapFragment.getMapAsync(this)

        binding.button2.setOnClickListener {
            fusedLocation = LocationServices.getFusedLocationProviderClient(this)
            fusedLocation.lastLocation.addOnSuccessListener { location: Location? ->
                val latLong = LatLng(location!!.latitude, location.longitude)
                myMap.addMarker(MarkerOptions().position(latLong).title("Found Location"))

                myMap.moveCamera(CameraUpdateFactory.newLatLngZoom(latLong, 10f))
            }
        }
    }

    override fun onMapReady(p0: GoogleMap) {
        myMap = p0
    }

}

When I run the app, I get the following exception:

2021-10-19 16:46:09.859 8556-8556/com.realtomjoney.mapsapp E/AndroidRuntime: FATAL EXCEPTION: main
    Process: com.realtomjoney.mapsapp, PID: 8556
    java.lang.NullPointerException
        at com.realtomjoney.mapsapp.MainActivity.onCreate$lambda-1$lambda-0(MainActivity.kt:46)
        at com.realtomjoney.mapsapp.MainActivity.$r8$lambda$wwcxhtPyugLtHLn65vCEt3JY33Q(Unknown Source:0)
        at com.realtomjoney.mapsapp.MainActivity$$ExternalSyntheticLambda1.onSuccess(Unknown Source:4)
        at com.google.android.gms.tasks.zzn.run(com.google.android.gms:play-services-tasks@@17.2.0:4)
        at android.os.Handler.handleCallback(Handler.java:938)
        at android.os.Handler.dispatchMessage(Handler.java:99)
        at android.os.Looper.loopOnce(Looper.java:201)
        at android.os.Looper.loop(Looper.java:288)
        at android.app.ActivityThread.main(ActivityThread.java:7842)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:548)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1003)

And yes, I have said yes to all permissions when I ran the app for the first time.

If this question is poorly written or a duplicate, please let me know as I strive to create good and well-structured questions.

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