无法使用离子服务在localhost中提供ionic3应用程序（空白页）

嗨，大家好我在一个应用程序工作了2个月，它从来没有过。今天我输入了离子发球，它给了我一个空白页面。我再次再次尝试;没有改变。

控制台的错误是这样的：

```
Failed to load resource: the server responded with a status of 404 (Not Found)
vendor.js Failed to load resource: the server responded with a status of 404 (Not Found)
main.js Failed to load resource: the server responded with a status of 404 (Not Found)
vendor.js Failed to load resource: the server responded with a status of 404 (Not Found)
main.js Failed to load resource: the server responded with a status of 404 (Not Found)
main.css Failed to load resource: the server responded with a status of 404 (Not Found)
```

然后我在互联网上搜索解决方案并尝试：

```
npm uninstall -g cordova ionic
npm install -g cordova ionic
```

但它没有用！

所以我记得，一旦我之前备份了我的app文件夹。所以我试过，看到它的工作原理。我将备份文件夹的www / build文件夹文件复制到我最新的app-folder中。并再次运行离子服务。它自动删除所有文件，但不起作用？

我无法提供我的应用程序？请帮助我们。我没有做任何接受这个错误我感到震惊！

终奌站：

```
Starting app-scripts server: --address 0.0.0.0 --port 8100 --livereload-port 35729 --dev-logger-port 53703 --nobrowser -
Ctrl+C to cancel
[04:35:39]  watch started ...
[04:35:39]  build dev started ...
[04:35:39]  clean started ...
[04:35:39]  clean finished in 7 ms
[04:35:39]  copy started ...
[04:35:39]  deeplinks started ...
[04:35:39]  deeplinks finished in 236 ms
[04:35:39]  transpile started ...
[04:35:43]  dev server running: http://localhost:8100/

[OK] Development server running!
     Local: http://localhost:8100
     External: http://192.168.1.3:8100, http://192.168.136.1:8100, http://192.168.80.1:8100
     DevApp: DenemeApp@8100 on ASUS

[04:35:44]  copy finished in 4.77 s
[04:35:44]  watch ready in 4.94 s

```

停在这里。

我的离子信息：

```

cli packages: (C:\Users\Uğur\AppData\Roaming\npm\node_modules)

    @ionic/cli-utils  : 1.19.0
    ionic (Ionic CLI) : 3.19.0

global packages:

    cordova (Cordova CLI) : 7.1.0

local packages:

    @ionic/app-scripts : 3.0.1
    Cordova Platforms  : none
    Ionic Framework    : ionic-angular 3.8.0

System:

    Node : v6.11.4
    npm  : 3.10.10
    OS   : Windows 8.1

Environment Variables:

    ANDROID_HOME : not set

Misc:

    backend : pro
```

尝试在8102端口提供应用程序。我不知道你是如何管理它的。但是您更改了构建可用的端口。因此，请运行以下命令：

$ ionic serve --p 8102