Since Premiere Elements is not the current version, I am almost certain that there is no further work being done for 12. Current version is already 14/14.1.
Please describe the problem....
a. What do you want to do...update from 12 to 12.1 using an opened project's Help Menu/Updates or update Camera Raw to 8.5 (that is the higher version that you should be able to get).
If this Help Menu/Update is not working for you and there updates eligible for you, are you doing the updates with the antivirus and firewalls disabled? Is there an error code associated with the failure.
b. What is the issue with Publish+Share?
Please consider, and supply details.