first upload all files

Modules/Attribute/Providers/AttributeServiceProvider.php

@@ -0,0 +1,29 @@
+<?php
+
+namespace Modules\Attribute\Providers;
+
+use Modules\Support\Traits\AddsAsset;
+use Illuminate\Support\ServiceProvider;
+use Modules\Admin\Ui\Facades\TabManager;
+use Modules\Attribute\Admin\AttributeTabs;
+use Modules\Attribute\Admin\AttributeSetTabs;
+use Modules\Attribute\Admin\ProductTabsExtender;
+
+class AttributeServiceProvider extends ServiceProvider
+{
+    use AddsAsset;
+
+    /**
+     * Bootstrap the application services.
+     *
+     * @return void
+     */
+    public function boot()
+    {
+        TabManager::register('attributes', AttributeTabs::class);
+        TabManager::register('attribute_sets', AttributeSetTabs::class);
+        TabManager::extend('products', ProductTabsExtender::class);
+
+        $this->addAdminAssets('admin.(attributes|products).(create|edit)', ['admin.attribute.css', 'admin.attribute.js']);
+    }
+}