I'm trying to book a train from Genoa to La Spezia in July. I've tried on the Trenitalia website and each time I get a message saying Error 406: Enough seats not available. Even though when I go to select my seats, there are clearly plenty of available seats.
I have also tried on italiarail, loco2 and trainline. I got similar error messages on each of these as well.
I have tried on different internet browsers, different devices, different ticket types...all with no luck.
Looks like others on here have had this problem in the past, but I couldn't find a solution.
Any ideas?