Hi there! We live in the UK and are travelling in Germany, via Brussels. I already got Eurostar tickets to Brussels and saw that the Germany One Country Pass covers travel between Brussels and Cologne, so I just bought that. But when I try to make a reservation via the timetable, the Brussels to Cologne or Cologne to Brussels part of the journey always says this:
Not available for some travellers
Some of your travellers' Passes are not valid on this train. Change your selected travellers to book this seat reservation.
This doesn’t happen for trips within Germany - only between Brussels and Cologne, but the site explicitly says that that route is included in the Germany pass. Any help appreciated!