[Bug]: error while installing the pods

[gauravRNDev]

What happened?

when i try to install latest version of oneSIgnal SDK the pod install is not working on ios the

Steps to reproduce?

Xcode version:- 16
Mac OS - 14.5
Cocoapods :- 1.15.2
flutter version 3.42.4 and dart :- 3.5.3

install oneSignal_flutter sdk
follow all the steps provided in the one signal flutter 
pod install giving me this error

What did you expect to happen?

I expected it to install easily as I used one signal for many items in react native and this is my first time using one signal with Flutter

OneSignal Flutter SDK version

Release 5.2.6

Which platform(s) are affected?

• iOS
• Android

Relevant log output

### Command


/Users/apple/.rvm/gems/ruby-2.7.6/bin/pod install

Report

• What did you do?

• What did you expect to happen?

• What happened instead?

Stack

   CocoaPods : 1.15.2
        Ruby : ruby 2.7.6p219 (2022-04-12 revision c9c2245c0a) [x86_64-darwin22]
    RubyGems : 3.4.9
        Host : macOS 14.5 (23F79)
       Xcode : 16.0 (16A242d)
         Git : git version 2.40.0
Ruby lib dir : /Users/apple/.rvm/rubies/ruby-2.7.6/lib
Repositories : 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

Podfile

Uncomment this line to define a global platform for your project

platform :ios, '13.0'

CocoaPods analytics sends network stats synchronously affecting flutter build latency.

ENV['COCOAPODS_DISABLE_STATS'] = 'true'

project 'Runner', {
'Debug' => :debug,
'Profile' => :release,
'Release' => :release,
}

def flutter_root
generated_xcode_build_settings_path = File.expand_path(File.join('..', 'Flutter', 'Generated.xcconfig'), FILE)
unless File.exist?(generated_xcode_build_settings_path)
raise "#{generated_xcode_build_settings_path} must exist. If you're running pod install manually, make sure flutter pub get is executed first"
end

File.foreach(generated_xcode_build_settings_path) do |line|
matches = line.match(/FLUTTER_ROOT=(.*)/)
return matches[1].strip if matches
end
raise "FLUTTER_ROOT not found in #{generated_xcode_build_settings_path}. Try deleting Generated.xcconfig, then run flutter pub get"
end

require File.expand_path(File.join('packages', 'flutter_tools', 'bin', 'podhelper'), flutter_root)

flutter_ios_podfile_setup

target 'Runner' do
use_frameworks!
use_modular_headers!

flutter_install_all_ios_pods File.dirname(File.realpath(FILE))
target 'RunnerTests' do
inherit! :search_paths
end
end

post_install do |installer|
installer.pods_project.targets.each do |target|
flutter_additional_ios_build_settings(target)
end
end

target 'OneSignalNotificationServiceExtension' do
use_frameworks!
pod 'OneSignalXCFramework', '>= 5.0.0', '< 6.0'
end

### Error

RuntimeError - PBXGroup attempted to initialize an object with unknown ISA PBXFileSystemSynchronizedRootGroup from attributes: {"isa"=>"PBXFileSystemSynchronizedRootGroup", "exceptions"=>["18DD18082CCA1C6900C04461"], "explicitFileTypes"=>{}, "explicitFolders"=>[], "path"=>"OneSignalNotificationServiceExtension", "sourceTree"=>"<group>"}
If this ISA was generated by Xcode please file an issue: https://github.com/CocoaPods/Xcodeproj/issues/new
/Users/apple/.rvm/rubies/ruby-2.7.6/lib/ruby/gems/2.7.0/gems/xcodeproj-1.25.1/lib/xcodeproj/project/object.rb:359:in rescue in object_with_uuid' /Users/apple/.rvm/rubies/ruby-2.7.6/lib/ruby/gems/2.7.0/gems/xcodeproj-1.25.1/lib/xcodeproj/project/object.rb:349:in object_with_uuid'
/Users/apple/.rvm/rubies/ruby-2.7.6/lib/ruby/gems/2.7.0/gems/xcodeproj-1.25.1/lib/xcodeproj/project/object.rb:300:in block (2 levels) in configure_with_plist' /Users/apple/.rvm/rubies/ruby-2.7.6/lib/ruby/gems/2.7.0/gems/xcodeproj-1.25.1/lib/xcodeproj/project/object.rb:299:in each'
/Users/apple/.rvm/rubies/ruby-2.7.6/lib/ruby/gems/2.7.0/gems/xcodeproj-1.25.1/lib/xcodeproj/project/object.rb:299:in block in configure_with_plist' /Users/apple/.rvm/rubies/ruby-2.7.6/lib/ruby/gems/2.7.0/gems/xcodeproj-1.25.1/lib/xcodeproj/project/object.rb:296:in each'
/Users/apple/.rvm/rubies/ruby-2.7.6/lib/ruby/gems/2.7.0/gems/xcodeproj-1.25.1/lib/xcodeproj/project/object.rb:296:in configure_with_plist' /Users/apple/.rvm/rubies/ruby-2.7.6/lib/ruby/gems/2.7.0/gems/xcodeproj-1.25.1/lib/xcodeproj/project.rb:272:in new_from_plist'
/Users/apple/.rvm/rubies/ruby-2.7.6/lib/ruby/gems/2.7.0/gems/xcodeproj-1.25.1/lib/xcodeproj/project/object.rb:350:in object_with_uuid' /Users/apple/.rvm/rubies/ruby-2.7.6/lib/ruby/gems/2.7.0/gems/xcodeproj-1.25.1/lib/xcodeproj/project/object.rb:290:in block in configure_with_plist'
/Users/apple/.rvm/rubies/ruby-2.7.6/lib/ruby/gems/2.7.0/gems/xcodeproj-1.25.1/lib/xcodeproj/project/object.rb:287:in each' /Users/apple/.rvm/rubies/ruby-2.7.6/lib/ruby/gems/2.7.0/gems/xcodeproj-1.25.1/lib/xcodeproj/project/object.rb:287:in configure_with_plist'
/Users/apple/.rvm/rubies/ruby-2.7.6/lib/ruby/gems/2.7.0/gems/xcodeproj-1.25.1/lib/xcodeproj/project.rb:272:in new_from_plist' /Users/apple/.rvm/rubies/ruby-2.7.6/lib/ruby/gems/2.7.0/gems/xcodeproj-1.25.1/lib/xcodeproj/project.rb:213:in initialize_from_file'
/Users/apple/.rvm/rubies/ruby-2.7.6/lib/ruby/gems/2.7.0/gems/xcodeproj-1.25.1/lib/xcodeproj/project.rb:113:in open' /Users/apple/.rvm/gems/ruby-2.7.6/gems/cocoapods-1.15.2/lib/cocoapods/installer/analyzer.rb:1194:in block (2 levels) in inspect_targets_to_integrate'
/Users/apple/.rvm/gems/ruby-2.7.6/gems/cocoapods-1.15.2/lib/cocoapods/installer/analyzer.rb:1193:in each' /Users/apple/.rvm/gems/ruby-2.7.6/gems/cocoapods-1.15.2/lib/cocoapods/installer/analyzer.rb:1193:in block in inspect_targets_to_integrate'
/Users/apple/.rvm/gems/ruby-2.7.6/gems/cocoapods-1.15.2/lib/cocoapods/user_interface.rb:64:in section' /Users/apple/.rvm/gems/ruby-2.7.6/gems/cocoapods-1.15.2/lib/cocoapods/installer/analyzer.rb:1188:in inspect_targets_to_integrate'
/Users/apple/.rvm/gems/ruby-2.7.6/gems/cocoapods-1.15.2/lib/cocoapods/installer/analyzer.rb:107:in analyze' /Users/apple/.rvm/gems/ruby-2.7.6/gems/cocoapods-1.15.2/lib/cocoapods/installer.rb:422:in analyze'
/Users/apple/.rvm/gems/ruby-2.7.6/gems/cocoapods-1.15.2/lib/cocoapods/installer.rb:244:in block in resolve_dependencies' /Users/apple/.rvm/gems/ruby-2.7.6/gems/cocoapods-1.15.2/lib/cocoapods/user_interface.rb:64:in section'
/Users/apple/.rvm/gems/ruby-2.7.6/gems/cocoapods-1.15.2/lib/cocoapods/installer.rb:243:in resolve_dependencies' /Users/apple/.rvm/gems/ruby-2.7.6/gems/cocoapods-1.15.2/lib/cocoapods/installer.rb:162:in install!'
/Users/apple/.rvm/gems/ruby-2.7.6/gems/cocoapods-1.15.2/lib/cocoapods/command/install.rb:52:in run' /Users/apple/.rvm/rubies/ruby-2.7.6/lib/ruby/gems/2.7.0/gems/claide-1.1.0/lib/claide/command.rb:334:in run'
/Users/apple/.rvm/gems/ruby-2.7.6/gems/cocoapods-1.15.2/lib/cocoapods/command.rb:52:in run' /Users/apple/.rvm/gems/ruby-2.7.6/gems/cocoapods-1.15.2/bin/pod:55:in <top (required)>'
/Users/apple/.rvm/gems/ruby-2.7.6/bin/pod:25:in load' /Users/apple/.rvm/gems/ruby-2.7.6/bin/pod:25:in

'
/Users/apple/.rvm/gems/ruby-2.7.6/bin/ruby_executable_hooks:22:in eval' /Users/apple/.rvm/gems/ruby-2.7.6/bin/ruby_executable_hooks:22:in '

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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%2218DD18082CCA1C6900C04461%22%5D%2C+%22explicitFileTypes%22%3D%3E%7B%7D%2C+%22explicitFolders%22%3D%3E%5B%5D%2C+%22path%22%3D%3E%22OneSignalNotificationServiceExtension%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

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• I agree to follow this project's Code of Conduct

[gauravRNDev]

if anyone comes across this issue then please downgrade your Xcode version to 15 in my case I downgrade to 15.3 and still, there will be one more error for which you should refer to this thread and all your builds and testing will work as expected.
#857 (comment)

[BisoDevil]

if anyone comes across this issue then please downgrade your Xcode version to 15 in my case I downgrade to 15.3 and still, there will be one more error for which you should refer to this thread and all your builds and testing will work as expected. #857 (comment)

not worked

[gauravRNDev]

if anyone comes across this issue then please downgrade your Xcode version to 15 in my case I downgrade to 15.3 and still, there will be one more error for which you should refer to this thread and all your builds and testing will work as expected. #857 (comment)

not worked

update your pods according to your new xcode version if you downgrade your xcode