Error in loadMultiple from Kotlin

[subhra9326]

 var uris  = arrayOf("https://images.pexels.com/photos/45170/kittens-cat-cat-puppy-rush-45170.jpeg", "https://upload.wikimedia.org/wikipedia/commons/3/3c/Enrique_Simonet_-_Marina_veneciana_6MB.jpg", "https://d15shllkswkct0.cloudfront.net/wp-content/blogs.dir/1/files/2017/01/Google-acquires-Fabric.png")

                                FileLoader.multiFileDownload(this)
                                        .fromDirectory(Environment.DIRECTORY_PICTURES, FileLoader.DIR_EXTERNAL_PUBLIC)
                                        .progressListener(object: MultiFileDownloadListener() {
                                            override fun onProgress(p0: File?, progress: Int, totalFiles: Int) {
                                                println("DownloadFile: $progress | TotalFile $Int" )
                                            }

                                            override fun onError(e: java.lang.Exception?, progress: Int) {
                                                super.onError(e, progress)
                                                println("ErrorOnPrgress: $progress | Error $e" )
                                            }
                                        }).loadMultiple(uris)

After tring this I got error in .loadMultiple(uris), Please help