Pod update reports that Xcodeproj doesn't know about the following attributes {"inputFileListPaths"=>[], solution

When performing `pod update` in the project, the following error is reported:

### Error

```
RuntimeError - [!] Xcodeproj doesn't know about the following attributes {"inputFileListPaths"=>[], "outputFileListPaths"=>[]} for the 'PBXShellScriptBuildPhase' isa.
If this attribute was generated by Xcode please file an issue: https://github.com/CocoaPods/Xcodeproj/issues/new
/Library/Ruby/Gems/2.3.0/gems/xcodeproj-1.5.7/lib/xcodeproj/project/object.rb:321:in `configure_with_plist'
/Library/Ruby/Gems/2.3.0/gems/xcodeproj-1.5.7/lib/xcodeproj/project.rb:262:in `new_from_plist'
...
...
...

```

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[!] Oh no, an error occurred.

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solution

1. Find the `xxx.xcodeproj` file in the project, right-click to display the package content, and open the `project.pbxproj` file.

2. Search `inputFileListPaths`, `outputFileListPaths`, and remove related codes.

3. Re-run `pod update`.