Between yesterday and today, I have tried several times to create an account and am supposed to receive an email with a link to continue the creation process. I have not received the email and have checked my spam folder as well. Has anyone had this issue? I have spent quite a bit of time looking at the FAQ on the website but having no luck.
Try this website: https://www.sncf-connect.com/en-en/. There is an app too.
I have had good luck with the website Ed gave you. I was having trouble finding an SNCF site for English-drew a few too many with French. Once I used the recommended, I was able to get Advantage cards purchased and ready to go.Now have the correct site on my phone so I can find my purchased tickets. You will succeed!