This is my first time using the interrail (I have Interrail global pass.), so I’m a little bit new in this trains-world and I think I need your help, guys. I have read some posts where it is explained how to book the seats in differents websites, but I have tried to book the nightjet 469 from Paris to Salzburg on the 14th of July at 19:57 at oebb.at, and I couldn’t make it. As you can see in this picture, it says it is not possible.
So I would like to ask you, if there is any other site where or how I can book this trip, because I tried also in bahn.de and it is not possible too :(