Map with offline tiles doens't work without internet

[Amir Afendin]

Map {
        id: map

        anchors.fill: parent
        activeMapType: map.supportedMapTypes[1]
        minimumZoomLevel: 13
        maximumZoomLevel: 19
        zoomLevel: 17
        center: QtPositioning.coordinate(-0.007, 0.007)
        plugin: Plugin {
            name: "osm"
            PluginParameter {
                name: "osm.mapping.offline.directory"
                value: "tiles" //offline tiles folder
            }
        }
    }

That gives me a nice working rectangular map(i made my tiles that way). But without network on my PC, after launching the app, my window goes fully grey and doens't show any tiles.