pod 적용 중 FrozenError 임시 해결하기

/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.11.3/lib/cocoapods/user_interface/error_report.rb:34:in `force_encoding': can't modify frozen String (FrozenError)
	from /Library/Ruby/Gems/2.6.0/gems/cocoapods-1.11.3/lib/cocoapods/user_interface/error_report.rb:34:in `report'
	from /Library/Ruby/Gems/2.6.0/gems/cocoapods-1.11.3/lib/cocoapods/command.rb:66:in `report_error'
	from /Library/Ruby/Gems/2.6.0/gems/claide-1.1.0/lib/claide/command.rb:396:in `handle_exception'
	from /Library/Ruby/Gems/2.6.0/gems/claide-1.1.0/lib/claide/command.rb:337:in `rescue in run'
	from /Library/Ruby/Gems/2.6.0/gems/claide-1.1.0/lib/claide/command.rb:324:in `run'
	from /Library/Ruby/Gems/2.6.0/gems/cocoapods-1.11.3/lib/cocoapods/command.rb:52:in `run'
	from /Library/Ruby/Gems/2.6.0/gems/cocoapods-1.11.3/bin/pod:55:in `<top (required)>'
	from /usr/local/bin/pod:23:in `load'
	from /usr/local/bin/pod:23:in `<main>'
/Library/Ruby/Gems/2.6.0/gems/xcodeproj-1.21.0/lib/xcodeproj/project.rb:228:in `initialize_from_file': [Xcodeproj] Unknown object version (56). (RuntimeError)
	from /Library/Ruby/Gems/2.6.0/gems/xcodeproj-1.21.0/lib/xcodeproj/project.rb:113:in `open'
	from /Library/Ruby/Gems/2.6.0/gems/cocoapods-1.11.3/lib/cocoapods/command/init.rb:41:in `validate!'
	from /Library/Ruby/Gems/2.6.0/gems/claide-1.1.0/lib/claide/command.rb:333:in `run'
	from /Library/Ruby/Gems/2.6.0/gems/cocoapods-1.11.3/lib/cocoapods/command.rb:52:in `run'
	from /Library/Ruby/Gems/2.6.0/gems/cocoapods-1.11.3/bin/pod:55:in `<top (required)>'
	from /usr/local/bin/pod:23:in `load'
	from /usr/local/bin/pod:23:in `<main>'

프로젝트에 코코아팟을 적용하고 싶었을 뿐인데... 끔찍한 에러가 등장했다...

CocoaPods 재설치, brew 업데이트, 로제타 사용 등 구글링으로 등장한 모든 방법을 다양하게 시도했지만 모두 처절하게 실패.
결국 프로젝트 버전을 13으로 낮추는 것으로 Podfile 생성에 성공했다.

임시적인 해결책이기 때문에 다른 해결법을 찾게 되면 업데이트 하겠습니다... 눈물난다...