You should not buy any tickets but go to a manually assisted gate to get through. There should be gates for persons needing assistance. Or a phone where you can call for help.

Hey Anna.

Unfortunately there weren‘t any people who could give assistance, the service point was closed. And at the assistance phone nobody anwered :(

Bur we‘re gonna try to fix this directly with Interrail now. Thanks anyway!

This is an old-age problem that also existed wenn there were only paper-passes-these gates only work with the local tickets with magnetic stripes. I have mentioned this fairly often in relevant points.

Same-same exist in the PT/LIsboa area for smaller local stations where they have chipcards and not old-style stripes, but in essence it boils down to the same

@Nanja maybe the page about Spain (and the network guide in the app) could be updated with what to do when you have to pass a gate at an unstaffed station? I'm sure RENFE can give you information about that.

Thanks for the suggestion rvdborgt. Will look into it and come back to you on that.