When generating a Search Report for any collection, the report status appears as "Complete". However, when i attempt to View or Export the report i am getting an error indicating "Internal error on generating report.". I am able to 'Update' the report to regenerate the report however, the same issue occurs when i view/edit the new report.
Event logs don't show anything other than the report generation event.
I'm pretty sure that's a known bug that's fixed in one of the most recently released patches. Log a ticket with Google and they'll give you the details and should be able to give you a support script that you can run for a temporary fix until you apply the patch.