diff --git a/app/Exceptions/E.php b/app/Exceptions/E.php
deleted file mode 100644
index 372cb1bc..00000000
--- a/app/Exceptions/E.php
+++ /dev/null
@@ -1,39 +0,0 @@
-<?php
-
-namespace App\Exceptions;
-
-class E extends \Exception
-{
-    /**
-     * Custom error handler
-     *
-     * @param string  $message
-     * @param integer $code
-     * @param boolean $render, to show a error page
-     */
-    function __construct($message = "Error occured.", $code = -1, $render = false)
-    {
-        parent::__construct($message, $code);
-        if ($render) {
-            $this->showErrorPage();
-        } else {
-            $this->showErrorJson();
-        }
-    }
-
-    private function showErrorJson()
-    {
-        $exception['errno'] = $this->code;
-        $exception['msg'] = $this->message;
-        @header('Content-type: application/json; charset=utf-8');
-        exit(json_encode($exception));
-    }
-
-    private function showErrorPage()
-    {
-        echo \View::make('errors.e')->with('code', $this->code)
-                                    ->with('message', $this->message)
-                                    ->render();
-        exit;
-    }
-}
diff --git a/app/Exceptions/PrettyPageException.php b/app/Exceptions/PrettyPageException.php
index e06f9c2b..739f748e 100644
--- a/app/Exceptions/PrettyPageException.php
+++ b/app/Exceptions/PrettyPageException.php
@@ -4,5 +4,26 @@ namespace App\Exceptions;
 
 class PrettyPageException extends \Exception
 {
+    /**
+     * Custom error handler
+     *
+     * @param string  $message
+     * @param integer $code
+     * @param boolean $render, to show a error page
+     */
+    function __construct($message = "Error occured.", $code = -1, $render = false)
+    {
+        parent::__construct($message, $code);
 
+        if ($render)
+            $this->showErrorPage();
+    }
+
+    private function showErrorPage()
+    {
+        echo \View::make('errors.e')->with('code', $this->code)
+                                    ->with('message', $this->message)
+                                    ->render();
+        exit;
+    }
 }
diff --git a/config/app.php b/config/app.php
index 7b98d124..2e6e2fa8 100644
--- a/config/app.php
+++ b/config/app.php
@@ -219,7 +219,6 @@ return [
         'Option'    => App\Services\Facades\Option::class,
         'Utils'     => App\Services\Utils::class,
         'Minecraft' => App\Services\Minecraft::class,
-        'Validate'  => App\Services\Validate::class,
         'Updater'   => App\Services\Updater::class,
         'Database'  => App\Services\Facades\Database::class,
 
diff --git a/setup/bootstrap.php b/setup/bootstrap.php
index e9f4b7a9..3ecc30ee 100644
--- a/setup/bootstrap.php
+++ b/setup/bootstrap.php
@@ -35,6 +35,29 @@ Illuminate\Support\Facades\Facade::setFacadeApplication($app);
 (new Illuminate\Database\DatabaseServiceProvider($app))->register();
 (new Illuminate\Filesystem\FilesystemServiceProvider($app))->register();
 
+$app['url'] = $app->share(function ($app) {
+    $routes = $app['router']->getRoutes();
+
+    // The URL generator needs the route collection that exists on the router.
+    // Keep in mind this is an object, so we're passing by references here
+    // and all the registered routes will be available to the generator.
+    $app->instance('routes', $routes);
+
+    $request = Symfony\Component\HttpFoundation\Request::createFromGlobals();
+
+    $request = (new Illuminate\Http\Request)->duplicate(
+        $request->query->all(), $request->request->all(), $request->attributes->all(),
+        // quick fix: replace request URI with empty string
+        $request->cookies->all(), $request->files->all(), array_replace($request->server->all(), ['REQUEST_URI' => ''])
+    );
+
+    $url = new Illuminate\Routing\UrlGenerator(
+        $routes, $request
+    );
+
+    return $url;
+});
+
 $app->singleton('database', App\Services\Database\Database::class);
 $app->singleton('option',   App\Services\OptionRepository::class);
 
diff --git a/setup/index.php b/setup/index.php
index 5a8f1808..7d6b7185 100644
--- a/setup/index.php
+++ b/setup/index.php
@@ -4,7 +4,7 @@
  */
 
 require __DIR__."/bootstrap.php";
-
+throw new App\Exceptions\PrettyPageException('非法参数', 1, true);
 // If already installed
 if (checkTableExist()) {
     View::show('setup.locked');
@@ -73,7 +73,7 @@ switch ($step) {
 
         if (!is_dir(BASE_DIR.'/storage/textures/')) {
             if (!mkdir(BASE_DIR.'/storage/textures/'))
-                throw new E('textures 文件夹创建失败，请确认目录权限是否正确，或者手动放置一个。', -1);
+                throw new App\Exceptions\PrettyPageException('textures 文件夹创建失败，请确认目录权限是否正确，或者手动放置一个。', -1);
         }
 
         echo View::make('setup.steps.3')->with('email', $_POST['email'])->with('password', $_POST['password']);
@@ -81,6 +81,6 @@ switch ($step) {
         break;
 
     default:
-        throw new App\Exceptions\E('非法参数', 1, true);
+        throw new App\Exceptions\PrettyPageException('非法参数', 1, true);
         break;
 }