由于我在尝试运行flutter应用程序时运行了flutter upgrade，因此出现了以下错误：
[!] An error occurred while processing the post-install hook of the Podfile
undefined method `each_child' for #<Dir:0x00007fcc34ccf6e8>
Did you mean? each_slice
/Users/youcefdahmani/Dev/flutter/packages/flutter_tools/bin/podhelper.rb:54:in `block in flutter_additional_ios_build_settings'
/Users/youcefdahmani/Dev/flutter/packages/flutter_tools/bin/podhelper.rb:51:in `each'
/Users/youcefdahmani/Dev/flutter/packages/flutter_tools/bin/podhelper.rb:51:in `flutter_additional_ios_build_settings'
/Users/youcefdahmani/Work/Projects/MyShop/my_shop_app/ios/Podfile:39:in `block (3 levels) in from_ruby'
/Users/youcefdahmani/Work/Projects/MyShop/my_shop_app/ios/Podfile:38:in `each'
/Users/youcefdahmani/Work/Projects/MyShop/my_shop_app/ios/Podfile:38:in `block (2 levels) in from_ruby'
/Users/youcefdahmani/.rbenv/versions/2.5.8/lib/ruby/gems/2.5.0/gems/cocoapods-core-1.10.1/lib/cocoapods-core/podfile.rb:179:in `post_install!'
/Users/youcefdahmani/.rbenv/versions/2.5.8/lib/ruby/gems/2.5.0/gems/cocoapods-1.10.1/lib/cocoapods/installer.rb:897:in `run_podfile_post_install_hook'
/Users/youcefdahmani/.rbenv/versions/2.5.8/lib/ruby/gems/2.5.0/gems/cocoapods-1.10.1/lib/cocoapods/installer.rb:885:in `block in run_podfile_post_install_hooks'
/Users/youcefdahmani/.rbenv/versions/2.5.8/lib/ruby/gems/2.5.0/gems/cocoapods-1.10.1/lib/cocoapods/user_interface.rb:145:in `message'
/Users/youcefdahmani/.rbenv/versions/2.5.8/lib/ruby/gems/2.5.0/gems/cocoapods-1.10.1/lib/cocoapods/installer.rb:884:in `run_podfile_post_install_hooks'
/Users/youcefdahmani/.rbenv/versions/2.5.8/lib/ruby/gems/2.5.0/gems/cocoapods-1.10.1/lib/cocoapods/installer.rb:329:in `block (2 levels) in create_and_save_projects'
/Users/youcefdahmani/.rbenv/versions/2.5.8/lib/ruby/gems/2.5.0/gems/cocoapods-1.10.1/lib/cocoapods/installer/xcode/pods_project_generator/pods_project_writer.rb:61:in
`write!'
/Users/youcefdahmani/.rbenv/versions/2.5.8/lib/ruby/gems/2.5.0/gems/cocoapods-1.10.1/lib/cocoapods/installer.rb:328:in `block in create_and_save_projects'
/Users/youcefdahmani/.rbenv/versions/2.5.8/lib/ruby/gems/2.5.0/gems/cocoapods-1.10.1/lib/cocoapods/user_interface.rb:64:in `section'
/Users/youcefdahmani/.rbenv/versions/2.5.8/lib/ruby/gems/2.5.0/gems/cocoapods-1.10.1/lib/cocoapods/installer.rb:307:in `create_and_save_projects'
/Users/youcefdahmani/.rbenv/versions/2.5.8/lib/ruby/gems/2.5.0/gems/cocoapods-1.10.1/lib/cocoapods/installer.rb:299:in `generate_pods_project'
/Users/youcefdahmani/.rbenv/versions/2.5.8/lib/ruby/gems/2.5.0/gems/cocoapods-1.10.1/lib/cocoapods/installer.rb:178:in `integrate'
/Users/youcefdahmani/.rbenv/versions/2.5.8/lib/ruby/gems/2.5.0/gems/cocoapods-1.10.1/lib/cocoapods/installer.rb:166:in `install!'
/Users/youcefdahmani/.rbenv/versions/2.5.8/lib/ruby/gems/2.5.0/gems/cocoapods-1.10.1/lib/cocoapods/command/install.rb:52:in `run'
/Users/youcefdahmani/.rbenv/versions/2.5.8/lib/ruby/gems/2.5.0/gems/claide-1.0.3/lib/claide/command.rb:334:in `run'
/Users/youcefdahmani/.rbenv/versions/2.5.8/lib/ruby/gems/2.5.0/gems/cocoapods-1.10.1/lib/cocoapods/command.rb:52:in `run'
/Users/youcefdahmani/.rbenv/versions/2.5.8/lib/ruby/gems/2.5.0/gems/cocoapods-1.10.1/bin/pod:55:in `<top (required)>'
/Users/youcefdahmani/.rbenv/versions/2.5.8/bin/pod:23:in `load'
/Users/youcefdahmani/.rbenv/versions/2.5.8/bin/pod:23:in `<main>'
/Users/youcefdahmani/.rbenv/versions/2.5.8/lib/ruby/gems/2.5.0/gems/cocoapods-1.10.1/lib/cocoapods/installer.rb:899:in `rescue in run_podfile_post_install_hook'
/Users/youcefdahmani/.rbenv/versions/2.5.8/lib/ruby/gems/2.5.0/gems/cocoapods-1.10.1/lib/cocoapods/installer.rb:896:in `run_podfile_post_install_hook'
/Users/youcefdahmani/.rbenv/versions/2.5.8/lib/ruby/gems/2.5.0/gems/cocoapods-1.10.1/lib/cocoapods/installer.rb:885:in `block in run_podfile_post_install_hooks'
/Users/youcefdahmani/.rbenv/versions/2.5.8/lib/ruby/gems/2.5.0/gems/cocoapods-1.10.1/lib/cocoapods/user_interface.rb:145:in `message'
/Users/youcefdahmani/.rbenv/versions/2.5.8/lib/ruby/gems/2.5.0/gems/cocoapods-1.10.1/lib/cocoapods/installer.rb:884:in `run_podfile_post_install_hooks'
/Users/youcefdahmani/.rbenv/versions/2.5.8/lib/ruby/gems/2.5.0/gems/cocoapods-1.10.1/lib/cocoapods/installer.rb:329:in `block (2 levels) in create_and_save_projects'
/Users/youcefdahmani/.rbenv/versions/2.5.8/lib/ruby/gems/2.5.0/gems/cocoapods-1.10.1/lib/cocoapods/installer/xcode/pods_project_generator/pods_project_writer.rb:61:in
`write!'
/Users/youcefdahmani/.rbenv/versions/2.5.8/lib/ruby/gems/2.5.0/gems/cocoapods-1.10.1/lib/cocoapods/installer.rb:328:in `block in create_and_save_projects'
/Users/youcefdahmani/.rbenv/versions/2.5.8/lib/ruby/gems/2.5.0/gems/cocoapods-1.10.1/lib/cocoapods/user_interface.rb:64:in `section'
/Users/youcefdahmani/.rbenv/versions/2.5.8/lib/ruby/gems/2.5.0/gems/cocoapods-1.10.1/lib/cocoapods/installer.rb:307:in `create_and_save_projects'
/Users/youcefdahmani/.rbenv/versions/2.5.8/lib/ruby/gems/2.5.0/gems/cocoapods-1.10.1/lib/cocoapods/installer.rb:299:in `generate_pods_project'
/Users/youcefdahmani/.rbenv/versions/2.5.8/lib/ruby/gems/2.5.0/gems/cocoapods-1.10.1/lib/cocoapods/installer.rb:178:in `integrate'
/Users/youcefdahmani/.rbenv/versions/2.5.8/lib/ruby/gems/2.5.0/gems/cocoapods-1.10.1/lib/cocoapods/installer.rb:166:in `install!'
/Users/youcefdahmani/.rbenv/versions/2.5.8/lib/ruby/gems/2.5.0/gems/cocoapods-1.10.1/lib/cocoapods/command/install.rb:52:in `run'
/Users/youcefdahmani/.rbenv/versions/2.5.8/lib/ruby/gems/2.5.0/gems/claide-1.0.3/lib/claide/command.rb:334:in `run'
/Users/youcefdahmani/.rbenv/versions/2.5.8/lib/ruby/gems/2.5.0/gems/cocoapods-1.10.1/lib/cocoapods/command.rb:52:in `run'
/Users/youcefdahmani/.rbenv/versions/2.5.8/lib/ruby/gems/2.5.0/gems/cocoapods-1.10.1/bin/pod:55:in `<top (required)>'
/Users/youcefdahmani/.rbenv/versions/2.5.8/bin/pod:23:in `load'
/Users/youcefdahmani/.rbenv/versions/2.5.8/bin/pod:23:in `<main>'
Error output from CocoaPods:
↳
[!] Automatically assigning platform `iOS` with version `11.0` on target `Runner` because no platform was specified. Please specify a platform for this target in your
Podfile. See `https://guides.cocoapods.org/syntax/podfile.html#platform`.
Error running pod install
Error launching application on iPhone 12 Pro Max.
这似乎是一个与我的ruby版本有关的错误，但当我检查我的版本时，它是2.5.8。我试图寻找这个问题的答案，但一无所获。请你帮忙解决这个问题。
将您的ruby版本至少更新到2.6.x
Flutter在后台依赖ruby，each_child命令从2.6 开始在ruby中引入