Unfortunately, a while back, we had a hardware failure in our mirror server. We made the decision to temporarily take the mirror offline. We’re working on restoring it, but it’s a low-priority project at this time. We hope to bring it back as soon as possible. It’s an invaluable resource!
Update: Our mirror is back! It’s still finalizing it’s initial sync, and that is expected to complete in probably the next couple of hours or so.