Hi,
We have documented this issue here. https://helpx.adobe.com/creative-cloud/packager/creative-cloud-package-installation-failed -error-message.html
To summarise, some Mac applications had outdated certificates.
We have updated the certificate for Acrobat and this should be repackaged.
Some older applications which are no longer being developed are not being updated and should be omitted from packages. Specifically Lightroom 4, 5 and Scout.
We plan to remove these applications from the Creative Cloud Packager.