[CFNetwork] Synchronous URL loading of https://api.mapbox.com/styles/v1/mapbox..... should not occur on this application's main thread as it may lead to UI unresponsiveness. Please switch to an asynchronous networking API such as URLSession.

[trunghvbk]

Xcode show the warning when I tried to access to Snapshot#image:
[CFNetwork] Synchronous URL loading of https://api.mapbox.com/styles/v1/mapbox..... should not occur on this application's main thread as it may lead to UI unresponsiveness. Please switch to an asynchronous networking API such as URLSession.
The class emitted this warning is Snapshot

Please help to check.
This is my sample code:

func takeSnapshot(mapView: MapView, passedLocations: [[CLLocation]]) -> UIImage? {
        var overlays = [Overlay]()
        overlays.append(contentsOf: markers.compactMap { marker in
            if let url = URL(string: marker.type.iconURL) {
                return CustomMarker(coordinate: marker.location.coordinate, url: url)
            }
            return nil
        })
        passedLocations.forEach { locations in
            let coordinates = locations.map { $0.coordinate }
            if coordinates.count >= 2 {
                let path = Path(
                    coordinates: coordinates
                )
                path.strokeColor = UIColor(red: 0.376, green: 0.439, blue: 0.941, alpha: 1)
                path.strokeWidth = 3
                path.fillColor = .clear
                overlays.append(path)
            }
        }

        let center = mapView.cameraState.center
        let zoom = mapView.cameraState.zoom
        let snapshotCamera = SnapshotCamera(lookingAtCenter: center, zoomLevel: zoom > 20 ? 20 : zoom)

        if let styleURL = URL(string: StyleURI.streets.rawValue) {
            let options = SnapshotOptions(
                styleURL: styleURL,
                camera: snapshotCamera,
                size: mapView.bounds.size)

            options.overlays = overlays
            let snapshot = Snapshot(
                options: options,
                accessToken: MapBoxResource.accessToken
            )
            return snapshot.image
        }
        return nil
    }