Hi,
Looks like you don't have the right "Apple Intermediate Certificates" version installed in the keychain. Below how you can fix this.
Double click your pass & scroll down to "Issuer Name". Look for "Organizational Unit" value i.e. G3, G4, etc. under "Apple Worldwide Developer Relations Certification Authority".
Once you know this G number, go to certificate authority page via this link, https://www.apple.com/certificateauthority/
Look for the right certificate to download under "Apple Intermediate Certificates" list, it should be one from the list of "Worldwide Developer Reference - G" <-- should match your value for "Organizational Unit" above.
Download & install this certificate & your pass type id should now be trusted.
Hope this helps.
Topic:
App & System Services
SubTopic:
Apple Pay
Tags: