Summary: User is not able to see information (Inbound, Spam and Outbound emails etc.) from aggregated reports. Please see sample screenshot attached. (No information since March 14th)
This is a known issue from the Google Team which affects all G Suite accounts.
They are working on a solution. by building a new pipeline.
Workaround: The only workaround currently is through Reports API which you can find on https://developers.google.com/admin-sdk/reports/v1/get-start/getting-started
For more info, please refer to internal ticket #6892 and Google case #12333823
Engineering Team tracking #21886224
Update: Solved with fix from Google from April 3rd.