seeing exactly same error, have you found any solutions to this yet ?

there is not much beyond the snippet: pkgutil --check-signature /xxxx/Glean-1.0.0-universal.pkg Package "xxx-1.0.0-universal.pkg": Status: signed by a certificate that has since expired Certificate Chain: 1. 3rd Party Mac Developer Installer: XXXX Expires: 2024-06-01 22:33:34 +0000 SHA256 Fingerprint: CODES...