Sep 4, 2017 - 2:00 PM
I faced the same situation as PandP too -- same error message "Please check your details – a suitable offer could not be found." Yes, I believe PandP was at the SBB timetable too.
In my case, I was searching for:
Luzern to Zürich Flughafen
Travel route Mon, 16.10.2017. Departure 14:41 (random timing)
There were a few options listed, but I was not able to select any of them to view the price.
Thanks in advance!