Hi Pete,
Thank you for your feedback with this issue. I've sent you a private message and you can share the tenant info with us via the following link.
https://answers.microsoft.com/en-us/privatemessage/inbox
Besides, if you still cannot view the issue in SHD, you can refer to the latest message as below. Also, I'll update in the post to share the next update information with you.
Title: Can't export Secure Score
User Impact: Admins may be unable to export the Secure Score through the Security and Compliance Center (SCC).
Current status: We've determined that a recent version upgrade to the source from which Secure Score collects data resulted in incompatibility issues between the source and feature, causing impact. We've developed a fix and verified through internal testing that the fix effectively resolves that issue. The fix is expected to start deployment to all affected environments on November 11, 2019 and we'll provide an updated timeline to completion at that time.
Scope of impact: Your organization is affected and any admin may be impacted.
Start time: Friday, October 18, 2019, at 12:00 PM UTC
Estimated time to resolve: We expect that fix is safely implemented through our change management process within the next three weeks.
Root cause: A recent version upgrade to the source from which Secure Score collects data resulted in incompatibility between the source and feature, resulting in impact.
Next update by: Monday, November 11, 2019, at 8:00 PM UTC
Regards,
Marvin