Xcode升级到16.0版本后，总是遇到各种奇奇怪怪的问题，昨天遇到一个刚创建的新项目pod init 和 pod install 命令报错的问题，整了半天才正好，具体报错如下：

### Command

```
/usr/local/bin/pod init
```

### Report

* What did you do?

* What did you expect to happen?

* What happened instead?


### Stack

```
   CocoaPods : 1.15.2
        Ruby : ruby 3.3.5 (2024-09-03 revision ef084cc8f4) [arm64-darwin24]
    RubyGems : 3.5.18
        Host : macOS 15.0 (24A335)
       Xcode : 16.0 (16A242d)
         Git : git version 2.39.5 (Apple Git-154)
Ruby lib dir : /opt/homebrew/Cellar/ruby/3.3.5/lib
Repositories : cocoapods - git - https://github.com/CocoaPods/Specs.git @ 243d93455721e4b6124e2d582b4f69816d683bb4

               trunk - CDN - https://cdn.cocoapods.org/
```

### Plugins

```
cocoapods-deintegrate : 1.0.5
cocoapods-plugins     : 1.0.0
cocoapods-search      : 1.0.1
cocoapods-trunk       : 1.6.0
cocoapods-try         : 1.2.0
```

### Error

```
RuntimeError - `PBXGroup` attempted to initialize an object with unknown ISA `PBXFileSystemSynchronizedRootGroup` from attributes: `{"isa"=>"PBXFileSystemSynchronizedRootGroup", "exceptions"=>["6B2564402CB6237800ED43B3"], "path"=>"PodDemo", "sourceTree"=>"<group>"}`
If this ISA was generated by Xcode please file an issue: https://github.com/CocoaPods/Xcodeproj/issues/new
/opt/homebrew/lib/ruby/gems/3.3.0/gems/xcodeproj-1.25.1/lib/xcodeproj/project/object.rb:359:in `rescue in object_with_uuid'
/opt/homebrew/lib/ruby/gems/3.3.0/gems/xcodeproj-1.25.1/lib/xcodeproj/project/object.rb:349:in `object_with_uuid'
/opt/homebrew/lib/ruby/gems/3.3.0/gems/xcodeproj-1.25.1/lib/xcodeproj/project/object.rb:300:in `block (2 levels) in configure_with_plist'
/opt/homebrew/lib/ruby/gems/3.3.0/gems/xcodeproj-1.25.1/lib/xcodeproj/project/object.rb:299:in `each'
/opt/homebrew/lib/ruby/gems/3.3.0/gems/xcodeproj-1.25.1/lib/xcodeproj/project/object.rb:299:in `block in configure_with_plist'
/opt/homebrew/lib/ruby/gems/3.3.0/gems/xcodeproj-1.25.1/lib/xcodeproj/project/object.rb:296:in `each'
/opt/homebrew/lib/ruby/gems/3.3.0/gems/xcodeproj-1.25.1/lib/xcodeproj/project/object.rb:296:in `configure_with_plist'
/opt/homebrew/lib/ruby/gems/3.3.0/gems/xcodeproj-1.25.1/lib/xcodeproj/project.rb:272:in `new_from_plist'
/opt/homebrew/lib/ruby/gems/3.3.0/gems/xcodeproj-1.25.1/lib/xcodeproj/project/object.rb:350:in `object_with_uuid'
/opt/homebrew/lib/ruby/gems/3.3.0/gems/xcodeproj-1.25.1/lib/xcodeproj/project/object.rb:290:in `block in configure_with_plist'
/opt/homebrew/lib/ruby/gems/3.3.0/gems/xcodeproj-1.25.1/lib/xcodeproj/project/object.rb:287:in `each'
/opt/homebrew/lib/ruby/gems/3.3.0/gems/xcodeproj-1.25.1/lib/xcodeproj/project/object.rb:287:in `configure_with_plist'
/opt/homebrew/lib/ruby/gems/3.3.0/gems/xcodeproj-1.25.1/lib/xcodeproj/project.rb:272:in `new_from_plist'
/opt/homebrew/lib/ruby/gems/3.3.0/gems/xcodeproj-1.25.1/lib/xcodeproj/project.rb:213:in `initialize_from_file'
/opt/homebrew/lib/ruby/gems/3.3.0/gems/xcodeproj-1.25.1/lib/xcodeproj/project.rb:113:in `open'
/opt/homebrew/lib/ruby/gems/3.3.0/gems/cocoapods-1.15.2/lib/cocoapods/command/init.rb:41:in `validate!'
/opt/homebrew/lib/ruby/gems/3.3.0/gems/claide-1.1.0/lib/claide/command.rb:333:in `run'
/opt/homebrew/lib/ruby/gems/3.3.0/gems/cocoapods-1.15.2/lib/cocoapods/command.rb:52:in `run'
/opt/homebrew/lib/ruby/gems/3.3.0/gems/cocoapods-1.15.2/bin/pod:55:in `<top (required)>'
/usr/local/bin/pod:25:in `load'
/usr/local/bin/pod:25:in `<main>'
```

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[!] Oh no, an error occurred.

Search for existing GitHub issues similar to yours:
https://github.com/CocoaPods/CocoaPods/search?q=%60PBXGroup%60+attempted+to+initialize+an+object+with+unknown+ISA+%60PBXFileSystemSynchronizedRootGroup%60+from+attributes%3A+%60%7B%22isa%22%3D%3E%22PBXFileSystemSynchronizedRootGroup%22%2C+%22exceptions%22%3D%3E%5B%226B2564402CB6237800ED43B3%22%5D%2C+%22path%22%3D%3E%22PodDemo%22%2C+%22sourceTree%22%3D%3E%22%3Cgroup%3E%22%7D%60%0AIf+this+ISA+was+generated+by+Xcode+please+file+an+issue%3A+https%3A%2F%2Fgithub.com%2FCocoaPods%2FXcodeproj%2Fissues%2Fnew&type=Issues

If none exists, create a ticket, with the template displayed above, on:
https://github.com/CocoaPods/CocoaPods/issues/new

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https://github.com/CocoaPods/CocoaPods/blob/master/CONTRIBUTING.md

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Looking for related issues on cocoapods/cocoapods...
Searching for inspections failed: undefined method `map' for nil

目前网上有两种解决方案：
第一种： https://github.com/CocoaPods/CocoaPods/issues/12583
第一种没有解决我的问题。

第二种： https://stackoverflow.com/questions/78984326/cocoapods-pod-init-fails-with-unknown-isa-pbxfilesystemsynchronizedrootgroup-e
第二种解决了我的问题。如果遇到这种问题的，可以尝试这两种方案。