This happens randomly. Your best bet is to contact apple support and ask them repair it. According to their techs, it happens sometimes if their is a failure in one of their CI pipelines, so they just need to find the failed job and hit retry. This is why sometimes it will work and sometimes not, it's random based on server failure.
D3icidal
Users receive reputation points by contributing quality content to the forums.
Posts include post and replies published on the forums.
Post authors can mark replies as Accepted to indicate successful solutions.
Apple Developer Forums admins can mark replies as Apple Recommended to indicate an approved solution
Last seen
User for
Post
Replies
Boosts
Views
Activity
Worked for me:
rm -rf ~/Library/Developer/Xcode/DerivedData/
rm -rf ~/Library/Caches/CocoaPods/
pod deintegrate
pod update
env:
	 CocoaPods : 1.9.3
				Ruby : ruby 2.6.3p62 (2019-04-16 revision 67580) [universal.x86_64-darwin19]
		RubyGems : 3.0.3
				Host : Mac OS X 10.15.7 (19H2)
			 Xcode : 12.0.1 (12A7300)
				 Git : git version 2.24.3 (Apple Git-128)
Ruby lib dir : /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib