Upvote:1
I was trying to do the same and had the same issues. I was booking a train from Barcelona to Amsterdam,
So Instead I opted to book out of a site called https://www.thetrainline.com/ which actually shows different train options. Please see if this works for your case.
Check this screenshot for more info. I have opted the same date as you mentioned. It is costing about 23 Euros for a single trip.
Upvote:3
As your post was written the 13th of September, at this time there were many rains and floods in the east of Spain and a lot of trains were cancelled. When this happen, the Renfe web page is not working properly and it is better if you call to Customer Support and buy the tickets with them.
Other option is to travel by bus, you can use this web www.alsa.com to buy the tickets