first upload all files

Modules/Admin/Providers/SidebarServiceProvider.php

@@ -0,0 +1,30 @@
+<?php
+
+namespace Modules\Admin\Providers;
+
+use Illuminate\Support\Facades\View;
+use Illuminate\Support\ServiceProvider;
+use Maatwebsite\Sidebar\SidebarManager;
+use Modules\Admin\Sidebar\AdminSidebar;
+use Modules\Admin\Http\ViewCreators\AdminSidebarCreator;
+
+class SidebarServiceProvider extends ServiceProvider
+{
+    /**
+     * Bootstrap any application services.
+     *
+     * @return void
+     */
+    public function boot(SidebarManager $manager)
+    {
+        if (! config('app.installed')) {
+            return;
+        }
+
+        if ($this->app['inAdminPanel']) {
+            $manager->register(AdminSidebar::class);
+        }
+
+        View::creator('admin::partials.sidebar', AdminSidebarCreator::class);
+    }
+}