Cocoapods: RuntimeError - [Xcodeproj] Unknown object version.

[maryanakotova]

Command

/usr/local/bin/pod install

Report

• What did you do?
  pod install

• What did you expect to happen?
  install app project pods

• What happened instead?
  runtime error

Stack

   CocoaPods : 1.9.3
        Ruby : ruby 2.6.3p62 (2019-04-16 revision 67580) [universal.x86_64-darwin20]
    RubyGems : 3.0.3
        Host : macOS 11.0.1 (20B50)
       Xcode : 12.2 (12B45b)
         Git : git version 2.24.3 (Apple Git-128)
Ruby lib dir : /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib
Repositories : cocoapods - git - https://github.com/CocoaPods/Specs.git @ f1403148e94e8f662b1cec6210eed9a789966cf9

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

Plugins

cocoapods-deintegrate : 1.0.4
cocoapods-plugins     : 1.0.0
cocoapods-search      : 1.0.0
cocoapods-stats       : 1.1.0
cocoapods-trunk       : 1.4.1
cocoapods-try         : 1.1.0

Podfile

source 'https://cdn.cocoapods.org/'

workspace 'Braintree.xcworkspace'
platform :ios, '12.0'
use_frameworks!
inhibit_all_warnings!

target 'Demo' do
  project 'Demo/Demo'
  pod 'InAppSettingsKit'
end

abstract_target 'Tests' do
  pod 'Specta'
  pod 'Expecta'
  pod 'OCMock'
  pod 'OHHTTPStubs'
  pod 'xcbeautify'

  target 'IntegrationTests'
  target 'BraintreeCoreTests'
  target 'BraintreeVenmoTests'
end

# https://github.com/CocoaPods/CocoaPods/issues/7314
post_install do |pi|
  pi.pods_project.targets.each do |t|
    t.build_configurations.each do |config|
      config.build_settings['IPHONEOS_DEPLOYMENT_TARGET'] = '12.0'
    end
  end
end

Error

RuntimeError - [Xcodeproj] Unknown object version.
/Library/Ruby/Gems/2.6.0/gems/xcodeproj-1.15.0/lib/xcodeproj/project.rb:227:in `initialize_from_file'
/Library/Ruby/Gems/2.6.0/gems/xcodeproj-1.15.0/lib/xcodeproj/project.rb:112:in `open'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.9.3/lib/cocoapods/installer/analyzer.rb:1177:in `block (2 levels) in inspect_targets_to_integrate'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.9.3/lib/cocoapods/installer/analyzer.rb:1176:in `each'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.9.3/lib/cocoapods/installer/analyzer.rb:1176:in `block in inspect_targets_to_integrate'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.9.3/lib/cocoapods/user_interface.rb:64:in `section'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.9.3/lib/cocoapods/installer/analyzer.rb:1171:in `inspect_targets_to_integrate'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.9.3/lib/cocoapods/installer/analyzer.rb:106:in `analyze'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.9.3/lib/cocoapods/installer.rb:410:in `analyze'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.9.3/lib/cocoapods/installer.rb:235:in `block in resolve_dependencies'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.9.3/lib/cocoapods/user_interface.rb:64:in `section'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.9.3/lib/cocoapods/installer.rb:234:in `resolve_dependencies'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.9.3/lib/cocoapods/installer.rb:156:in `install!'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.9.3/lib/cocoapods/command/install.rb:52:in `run'
/Library/Ruby/Gems/2.6.0/gems/claide-1.0.3/lib/claide/command.rb:334:in `run'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.9.3/lib/cocoapods/command.rb:52:in `run'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.9.3/bin/pod:55:in `<top (required)>'
/usr/local/bin/pod:23:in `load'
/usr/local/bin/pod:23:in `<main>'

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[!] Oh no, an error occurred.

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Looking for related issues on cocoapods/cocoapods...

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[maryanakotova]

it was demo project of Braintree from here

https://github.com/braintree/braintree_ios#installation

[dnkoutso]

Please gem update xcodeproj as you need the latest version of that gem for newer Xcode versions.

Going to close as already fixed.

[maryanakotova]

I tried 'gem update xcodeproj', but it is not work anyway. the same error.

[maryanakotova]

Please gem update xcodeproj as you need the latest version of that gem for newer Xcode versions.

Going to close as already fixed.

it is not fixed my error

[xLuciferSx]

Please gem update xcodeproj as you need the latest version of that gem for newer Xcode versions.
Going to close as already fixed.

it is not fixed my error

try - pod deintegrate and then pod install

[mudilajaganios]

Please gem update xcodeproj as you need the latest version of that gem for newer Xcode versions.

Going to close as already fixed.

Still the same issue.

Updating installed gems Nothing to update