I've been keeping my eye on award availability on Lufthansa flights booked through aeroplan (Air Canada). While availability and pricing has fluctuated, today there are no results. Instead, I get a message saying:

There are no flights available on the date you selected (Sep 15), but there may be flights on other days. Modify your search for more options.

To be clear:
- There are no flights available on any dates
- I have tried on multiple computers/phones/ISPs and asked a few friends
- I can still book the flights with cash
- No LH rewards are available (fixed or flexible)

Is this just a glitch - should I expect flights will become avaialable again in the upcoming days?