"This certificate has an invalid issuer" issue not resolved
In keychain my certificates is shown an invalid issuer. 
While I have correct "Apply world wide developer relations certificate authority" which will expire in 2023.
I have tried these links multiple time but no success
This certificate has an invalid issuer : Keychain marks all certificates as "Invalid Issuer"
please check your solution on apple's forums Uploading archive error
Step 1 : Open Keychain Access in your mac.
Step 2 : Go to View -> show expired certificates.
Step 3 : Select Certificates category. All certificate are there which are expired or not.
Step 4 : Select Login and System tab, and Search Apple Worldwide Developer Relation Certificate Authority and delete it from keychain.
Step 5 : Now download the new certificate from : AppleWWDRCA.cer
Step 6 : Go to download folder-> and double click on the certificate to install it. Your certificate is successfully installed.
For more in detail you can also check below blog