I met this error as well and found a solution online which solved it.
****The key issue here is the root certificate. ****
Delete all root certificate ("Apple Worldwide Developer Relations Certification Authority") from your Keychain Access. Click certificates and delete it from both LOGIN & SYSTEM (If both area have this certificate)
Then download the latest cert through link below, and double click to add to keychain
https://www.apple.com/certificateauthority/AppleWWDRCAG3.cer
Make sure it is in your Keychain's SYSTEM and you ONLY have ONE root certificate in your Keychain's SYSTEM area, NOT in LOGIN area.
KaneSheng
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