Hey, here’s Martin again.
Today I faced the Problem, that I wasn’t able to start the SQL Report Builder on a SCCM 2012 SP1 infrastructure, the following error message appears:
The Report Builder click-once application does not exist on the report server ‘$FQDN Primary Site Server’. Ensure that the report builder application manifest exists on the server and try again.
Googling this string led me to instructions, that told me to reinstall the Reporting Point. But this couldn’t be the best Job, because the Report Service actually works fine, all reports were working. So I found a very nice Blogpost about this Problem on TechNet (especially watch out for the update on SP1):