`update_code_signing_settings` error `Seems to be a very old project file format - please open your project file in a more recent version of Xcode` about fastlane

[maximkrouk]

I found a workaround, you can disable it in Podfile post-install

post_install do |installer|
  installer.pods_project.targets.each do |target|
    target.build_configurations.each do |config|

      # Mute Xcode os-deprecation warnings
      if config.build_settings['IPHONEOS_DEPLOYMENT_TARGET'] == '8.0'
        config.build_settings['IPHONEOS_DEPLOYMENT_TARGET'] = '11.0'
      end

      if config.build_settings['IPHONEOS_DEPLOYMENT_TARGET'] == '9.0'
        config.build_settings['IPHONEOS_DEPLOYMENT_TARGET'] = '11.0'
      end

      if config.build_settings['IPHONEOS_DEPLOYMENT_TARGET'] == '10.0'
        config.build_settings['IPHONEOS_DEPLOYMENT_TARGET'] = '11.0'
      end

      # Signing configuration

      config.build_settings['DEVELOPMENT_TEAM'] = <your_team_id>
      config.build_settings['CODE_SIGN_STYLE'] = 'Manual'
    end
  end
end

But it's just a workaround, I'd expect the lane to work correctly with update_code_signing_settings command

UPD:
This fixes CI, but breaks local dev build integrity, so the actual problem was related to appboy-ios-sdk dependency and I no longer need to setup signing after migrating import of this sdk to SPM and everything seems to work fine without config.build_settings['CODE_SIGN_STYLE'] = 'Manual'