first upload all files

Modules/Import/Providers/ImportServiceProvider.php

@@ -0,0 +1,21 @@
+<?php
+
+namespace Modules\Import\Providers;
+
+use Modules\Support\Traits\AddsAsset;
+use Illuminate\Support\ServiceProvider;
+
+class ImportServiceProvider extends ServiceProvider
+{
+    use AddsAsset;
+
+    /**
+     * Bootstrap the application services.
+     *
+     * @return void
+     */
+    public function boot()
+    {
+        $this->addAdminAssets('admin.importer.index', ['admin.import.js']);
+    }
+}