Add custom HTTP-500 error page

resources/lang/en/errors.yml

@@ -1,6 +1,7 @@
 http:
   msg-403: You have no permission to access this page.
   msg-404: Nothing here.
+  msg-500: Please try again later.
   msg-503: The application is now in maintenance mode.
 
 general:

resources/lang/zh_CN/errors.yml

@@ -1,6 +1,7 @@
 http:
   msg-403: 你并没有权限查看此页面
   msg-404: 这里啥都没有哦
+  msg-500: 服务器内部错误，请稍后再试
   msg-503: 网站维护中
 
 general:

resources/views/errors/500.tpl

@@ -0,0 +1,11 @@
+@extends('errors.general')
+
+@section('title', '500 Internal Server Error')
+
+@section('content')
+<h1>500 Internal Server Error
+    @include('setup.wizard.language')
+</h1>
+
+<p>{{ trans('errors.exception.detail', ['msg' => $exception->getMessage() ?: trans('errors.http.msg-500')]) }}</p>
+@endsection