iOS: Could not connect to development server.

name: iOS – Could not connect to development server. about: Something is not working as expected.

• I have reviewed the documentation
• I have searched existing issues
• I am using the latest React Native version

After I upgrade the node version（brew upgrade） and delete the old version（brew cleanup）, my project can not run.When I create a new project again, it does not still work ，The error is the same。 The error:

2018-05-29 11:56:56.492993+0800 WFNowRupiah[53558:479116] Task <8C75D585-C49B-43A7-9660-CCA1575E61BB>.<1> finished with error - code: -1001 2018-05-29 11:56:56.556 [error][tid:NSOperationQueue 0x604000222120 (QOS: UNSPECIFIED)][RCTCxxBridge.mm:420] Failed to load bundle(http://localhost:8081/index.bundle?platform=ios&dev=true&minify=false) with error:(Could not connect to development server. Ensure the following:

• Node server is running and available on the same network - run ‘npm start’ from react-native root
• Node server URL is correctly set in AppDelegate
• WiFi is enabled and connected to the same network as the Node Server

URL: http://localhost:8081/index.bundle?platform=ios&dev=true&minify=false The operation couldn’t be completed. (NSURLErrorDomain error -999.))

Environment

Environment: OS: macOS High Sierra 10.13.4 Node: 10.2.1 Yarn: 1.7.0 npm: 5.6.0 Watchman: 4.9.0 Xcode: Xcode 9.3.1 Build version 9E501 Android Studio: Not Found

Packages: (wanted => installed) react: 16.3.1 => 16.3.1 react-native: 0.55.4 => 0.55.4

Steps to Reproduce

Xcode / react-native run-ios

Expected Behavior

Hope it works！

Actual Behavior