I'm trying to book a partner award. After login I get all the way through to the right page via ... EuroBonus --> Use points --> Book partner award flights . After entering cities & dates I press "Search" and every time -- regardless of br

wser or device, I get this:
Session timed out
Your session has expired. Please restart the session or log out and log in again to continue.
This happens even when I've only just logged in 1 minute before pressing "Search." After seeing the error I find I am still logged in. Logging out and back in doesn't change anything. Either I'm doing something wrong or the site is broken or both.
Has anyone else had this issue?