Missing IOS Distribution Signing Identity Solution

I believe many friends and I encounter the same problem, before the release of iOS packaging certificate No problem, now inexplicably always packaging failure, and reported the following error

The first reaction is whether the certificate was messed up by someone else. So go to developer Member Center, all the distribution certificate all revoke, and new certificate, still reported this error.

Then have a look at the key access chain, found that the official all invalid, very strange, it is supposed to say that the newly generated formally should be no problem.

　　

Encounter on-line search, found that Apple Worldwid Developer relations Certification Authority problem, download the latest Applewwdrca certificate, installation can be ...

: Https://developer.apple.com/certificationauthority/AppleWWDRCA.cer

Students who want to meet this problem as soon as possible to resolve ^ ^

Missing IOS Distribution Signing Identity Solution