OS를 업데이트 했더니 잘 되던 pod install 명령이 안먹는다. Ignoring ffi-1.15.5 because its extensions are not built. Try: gem pristine ffi --version 1.15.5 /Library/Ruby/Gems/2.6.0/gems/cocoapods-1.11.3/lib/cocoapods/command.rb:128:in `git_version': Failed to extract git version from `git --version` ("xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), missing xcrun at: /Library/Deve..
