Looker Studio Scheduled Delivery not sending to Lists/Groups

[DataEngineer_1]

We have recently observed that the scheduled email delivery option just stopped sending emails to any group email ID's or Lists within Google Workspace.

This means that a lot of analytics reports which were being sent out to our business users just stopped going out.

We tried to trigger the reports manually but it just does not work with any of the group ID's and only individual email ID's seem to be working, but this is not feasible in our case since the end users keep changing.