开发服务器返回响应错误代码：500 in react native

我正在使用 react-native 框架来开发我的 Android 应用程序。我想使用 react-native-material-design 库来制作 Toolbar 具有更多功能。

我将此库安装在我的项目使用以下命令的当前目录中：-

 E:\>npm i react-native-material-design -g --save
C:\Users\ch-e00925\AppData\Roaming\npm
`-- react-native-material-design@0.3.7
  +-- react-native-material-design-styles@0.2.6  (git+https://github.com/react-n
ative-material-design/react-native-material-design-styles.git#bdc029c1a1c83ff563
d10868be38b8aed1e9989b)
  `-- react-native-vector-icons@2.1.0
    +-- lodash@4.17.4
    `-- yargs@4.8.1
      +-- cliui@3.2.0
      | +-- strip-ansi@3.0.1
      | | `-- ansi-regex@2.1.1
      | `-- wrap-ansi@2.1.0
      +-- decamelize@1.2.0
      +-- get-caller-file@1.0.2
      +-- lodash.assign@4.2.0
      +-- os-locale@1.4.0
      | `-- lcid@1.0.0
      |   `-- invert-kv@1.0.0
      +-- read-pkg-up@1.0.1
      | +-- find-up@1.1.2
      | | +-- path-exists@2.1.0
      | | `-- pinkie-promise@2.0.1
      | |   `-- pinkie@2.0.4
      | `-- read-pkg@1.1.0
      |   +-- load-json-file@1.1.0
      |   | +-- graceful-fs@4.1.11
      |   | +-- parse-json@2.2.0
      |   | | `-- error-ex@1.3.0
      |   | |   `-- is-arrayish@0.2.1
      |   | +-- pify@2.3.0
      |   | `-- strip-bom@2.0.0
      |   |   `-- is-utf8@0.2.1
      |   +-- normalize-package-data@2.3.5
      |   | +-- hosted-git-info@2.1.5
      |   | +-- is-builtin-module@1.0.0
      |   | | `-- builtin-modules@1.1.1
      |   | +-- semver@5.3.0
      |   | `-- validate-npm-package-license@3.0.1
      |   |   +-- spdx-correct@1.0.2
      |   |   | `-- spdx-license-ids@1.2.2
      |   |   `-- spdx-expression-parse@1.0.4
      |   `-- path-type@1.1.0
      +-- require-directory@2.1.1
      +-- require-main-filename@1.0.1
      +-- set-blocking@2.0.0
      +-- string-width@1.0.2
      | +-- code-point-at@1.1.0
      | `-- is-fullwidth-code-point@1.0.0
      |   `-- number-is-nan@1.0.1
      +-- which-module@1.0.0
      +-- window-size@0.2.0
      +-- y18n@3.2.1
      `-- yargs-parser@2.4.1
        `-- camelcase@3.0.0

E:\>

在此之后，我在运行应用程序时遇到了一个问题，可能是库没有成功安装。

 E:\Myntra>react-native start
Scanning 557 folders for symlinks in E:\Myntra\node_modules (114ms)
 ┌────────────────────────────────────────────────────────────────────────────┐

 │  Running packager on port 8081.                                            │

 │                                                                            │

 │  Keep this packager running while developing on any JS projects. Feel      │

 │  free to close this tab and run your own packager instance if you          │

 │  prefer.                                                                   │

 │                                                                            │

 │  https://github.com/facebook/react-native                                  │

 │                                                                            │

 └────────────────────────────────────────────────────────────────────────────┘

Looking for JS files in
   E:\Myntra

[01/23/2017, 13:36:07] <START> Initializing Packager
[01/23/2017, 13:36:08]         HMR Server listening on /hot

React packager ready.

[01/23/2017, 13:36:12] <START> Requesting bundle
                               bundle_url: /index.android.bundle?platform=androi
d&dev=true&hot=true&minify=false
[01/23/2017, 13:36:40] <START> Building Haste Map
[01/23/2017, 13:36:40] <END>   Building Haste Map (141ms)
[01/23/2017, 13:36:40] <END>   Initializing Packager (33314ms)
[01/23/2017, 13:36:40] <START> Transforming files
transformed 584/607 (96%)(node:6316) UnhandledPromiseRejectionWarning: Unhandled
 promise rejection (rejection id: 605): UnableToResolveError: Unable to resolve
module react-native-material-design-styles from E:\Myntra\node_modules\react-nat
ive-material-design\lib\config.js: Module does not exist in the module map or in
 these directories:
  E:\Myntra\node_modules\react-native-material-design\node_modules
,   E:\Myntra\node_modules

This might be related to https://github.com/facebook/react-native/issues/4968
To resolve try the following:
  1. Clear watchman watches: `watchman watch-del-all`.
  2. Delete the `node_modules` folder: `rm -rf node_modules && npm install`.
  3. Reset packager cache: `rm -fr $TMPDIR/react-*` or `npm start -- --reset-cac
he`.
[01/23/2017, 13:54:09] <START> Requesting bundle
                               bundle_url: /index.android.bundle?platform=androi
d&dev=true&hot=true&minify=false

PS：我在 Windows 7 机器上，找不到执行命令的方法。我已经看到了这个 The development server returned response error code: 500 in react-native 但它对我没有帮助。

谁能帮我解决这个问题。提前致谢。