安装Pod时无法找到规格

Question

# Uncomment the next line to define a global platform for your project
# platform :ios, '9.0'
target 'testprofile' do
  # Uncomment the next line if you're using Swift or would like to use dynamic frameworks
  # use_frameworks!

  # Pods for testprofile
  pod 'AppAuth', :git => 'https://github.com/GemHQ/react-native-app-auth.git', :branch => 'master', :tag => 'v2.4.0'

  target 'testprofile-tvOSTests' do
    inherit! :search_paths
    # Pods for testing
  end

  target 'testprofileTests' do
    inherit! :search_paths
    # Pods for testing
  end

end

# end
source 'https://github.com/CocoaPods/Specs.git'
platform :ios, '8.0'
use_frameworks!

pod 'DCTAuth', :git => 'https://github.com/danielctull/DCTAuth.git'

运行[!] Unable to find a specification for 'AppAuth'.时，我一直得到pod install

我尝试了很多事情，但是错误并没有消失。我不知道这里有什么问题。我在做什么错了？