I'm playing around with a DONEx ex CAI, and running into something that I can't understand. If I'm reading the rules correctly, Europe and Middle East are considered one continent. So my first stop from Cairo was going to be DOH. EF is showing several daily flights on QR between CAI and DOH, although it looks like these only offer first class and economy, not business. There's plenty of L availability. The rules say I can travel in a lower class of service if I purchase business and it is not offered or not available.

The OWE booking tool says: For the date you selected, we were unable to find any availability, please select an alternate day.

Am I missing something here, or is this a weird tool bug?