Has anyone encountered the situation where the pkg installer complains that the pkg has been signed with an expired certificate when in fact this is not true? I have an app built in October and signed with a Cert that expires in 8/2/2022. However, when we double-click on the pkg file it says the cert it was signed with has expired. If you "Show Certificate" you can see its expiration date is in 2022.
Installer falsely reports expired CERT.
Did you use Keychain Access to houseclean all expired and duplicate certs?