The certificate has an invalid issuer: keychain

Question

found problem in the keychain. I have the number of certificates in the key chain. they work until the day. but now there is the text "certificate has an invalid issuer" in red.

doesn't know what to do

Answer 1

-> Download https://developer.apple.com/certificationauthority/AppleWWDRCA.cer and double-click to install it in Keychain.

-> Select "View" → "Show Expired Certificates" in the Keychain application.

- > Apple Worldwide "" "" Keychain.

Answer 2

, :

1)
 2) →



 3)

 4) , " Apple Worldwide" . .
 5) Certificate .
 6) , .

!!!