We are aware of an issue with the SharePoint Site Usage Detail Report loading blank in Portal. Microsoft have acknowledged a problem that is causing SharePoint Site URLs to not display (Service Incident: SP676147). Site URLs are used within the Portal logic to generate the data within the Admin Report, therefore, without the URLs, the Portal data is not refreshed.
Microsoft are actively working on the issue and will be providing an update 8th December in which we can review the problem again.
Latest Updates and Guidance:
This is being investigated under problem record PRB0218343.
This report can be manually generated excluding the SharePoint Site URLs so if Administrators require this data, we request they raise a Service Request with the helpdesk (email@example.com) including the ODS Code/Organisation name. If Site URLs are required, then we apologise for the inconvenience and request users monitor the problem record for the latest updates coming soon.