I’d like to book a train for in three weeks’ time on the Copenhagen–Hamburg route, but on the DB website, when I try to book a seat, I get the message “Reservation cannot be made”. On OBB, it’s the same “Ticket not available”.... What should I do?
OBB:

DB:

Et également message d’erreur au moment de payer si je passe par Interrail…
Merci d’avance !!

